Pet ear antibiotic Mometamax

Most dogs with ear infections often have a combination of bacteria and/or yeast

In this post I will address some of the common questions asked about using the commonly prescribed topical ear antibiotic and antifungal product, Mometamax. Given that most dogs with ear infections often have a combination of bacteria and/or yeast, this product is one of the most versatile products available in the veterinary pharmacy and available by prescription from 1800PetMeds. The combination of ingredients not only decreases the underlying allergic reaction, but the overgrowth of various bacteria and yeast involved in the majority of canine or feline ear infections.

Although it is not labeled for use in cats, many veterinarians have prescribed this product widely to cats without any ill side effects. While it won’t kill ear mites, this product can also be used topically for yeast, local ringworm or bacterial infections. One of the biggest advantages over its nearly identical sister product Otomax, is that Mometamax can be used only once daily, thus increasing client compliance. My two favorite topical ear medicines in our pets include Mometamax and Zymox.

When used appropriately this product can be used for most common ear infections in our pets, and its long shelf life of at least a year in most cases, makes it a valuable part of the medicine cabinet in those pets with recurrent ear inflammations or infections.While Mometamax is a prescription topical antifungal and antibacterial, Zymox is a nonprescription topical which in my experience and opinion is as equally effective through a different mechanism in killing yeast and bacteria in the canine or feline ear canal. Side effects of Mometamax are rare, with the most serious being rare deafness in pets whose ear drum is not intact (this is best determined by veterinary exam of the ear canal before starting this medication), allergic reaction consisting of increased redness, discomfort and ear itching, and even more rare facial swelling.

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  1. I have a 11 year old Pekapoo and she is completely deaf after two applications of Mometamax. I specifically asked my Vet if there were any side affects with the drug and she did not tell me that deafness could occur. If I had known that, I would of asked for other options. I would never use this drug ever again and would not recommend it to anyone.

  2. Dr. Michael Dym, VMD veterinarianApril 13, 2010 at 11:38 pm

    HI Micki. I am sorry to hear of your dog’s deafness after application of mometamax. Unfortunately this can rarely occur, and on even rarer occasions can be reversable. I would consult homeopathic vet at for list of vets in your state who can perhaps help you, as no conventional treatment options in case like this so homeopathy the way to go in my opinion.

  3. After reading you site, Your site is very useful for me .I bookmarked your site!

  4. Dr. Michael Dym, VMD veterinarianMay 31, 2010 at 11:34 pm

    Thank you so much for your kind comment. Please share our blogs with all of your friends and family, as it is meant to provide animal guardians with useful information to make informed decisions when it comes to various health issues and products.

  5. I don’t know how “rare” this is but now that my own 12 yo lab mix has gone deaf after receiving Mometamax I am furious the vet gave no warning. Our dog went in for a yearly routine check, no hearing or ear complaints, and the doc said a fungus required this stuff.
    Pretty easy to find complaints here on the internet. I guess we have to cross check teh vet meds.
    FYI the dog has been on 25mg Proin for urinary incontinence for several years.

  6. Dr. Michael Dym, VMD veterinarianJune 30, 2010 at 12:36 am

    Yes rare reactions to the gentacin in the mometamax can occur, as can occur with any medication. Even proin can rarely cause high blood pressure in dogs, and in humans the main ingredient phenylproponolamine was taken off market because of cardiovascular complications in people. Fortunately we have not seen that many problems with proin in pets.

  7. Homeopathy is pseudoscience and quackery. It is appalling that a DVM is recommending it.

  8. Deafness from useing Mometamex is not rare. Check the hundreds of blogs on the internet. My 11 year old dog went deaf after useing it for 4 days. The Vet gave us no information on the side affects. I am very upset that this medicine is still on the market. DO NOT USE MOMETAMAX. Deafness is VERY COMMON!

  9. Dr. Michael Dym, VMD veterinarianDecember 13, 2010 at 12:56 am

    Thank you for sharing. I am sorry to hear of your canine companion’s reaction to this medicine. Reactions can occur with ANY drug, even holistic or homeopathic medicines. And overall they are rare. If we warned of every “possible reaction” with every medicine, noone would ever accept a prescription medicine that has helped a majority of patients. My own preference is to always try natural meds like zymox otic first. However over my conventional vet career, the overwhelming majority of pets who were prescribed otomax or mometomax did not go deaf, with only a few cases in the thousands of scripts I have written for it.

  10. I am sorry to say my Jack Russel who is 13 years old was also prescriped Mometamax for an ear infection and we noticed he stopped answering to our calls. My husband just chalked it up to him being older. I decided for the heck of it to look at reviews for this medication. He was prescibed the medication for two weeks and the deafness came on shortly before the two week period was over. We even did a “Let’s go Byebye ” test. Usually he runs to the car. Nothing. I am heart broken and so sad for my sweet Chester. I pray that he will soon hear the birds and sounds of our world once again.

  11. Dr. Michael Dym, VMD veterinarianMarch 26, 2011 at 11:51 am

    This is rare side effect unfortunately of this medicine. Do not use again. Sometimes hearing will gradually return. other times hearing loss is permanent. Not alot you can do.

  12. I brought my 11 year old Collie to vet for a possible ear infection. After her exam the vet said she did indeed have an infection and gave her one dose in the office of mometamax.
    Within an hour of being home she slept like she was in a coma. Then I realized that she was totally non-responsive to anything I said…..didn’t react when I called her name, clapped, shook the bell on the biscuit cabinet….nothing. She had gone deaf! This is after just one dose. No warning about this from the vet. Right on the company website it says “may cause temporary or permanent hearing loss/deafness in geriatric dogs.” Why wasn’t I warned about this before they gave it to her??
    I washed her ears out with Excel, this is the 3rd day now and she does seem a little bit better but her hearing is still not normal at all. Before this she had no problems whatsoever with her hearing.
    I’m so upset about this and if I could sue the company I would.

  13. Dr. Michael Dym, VMD veterinarianApril 4, 2011 at 9:25 pm

    Sorry to hear of the unfortunate issue with your collie. Yes this can be real reaction, although rare. Drug reactions are certainly not discussed enough by vets, etc.

  14. I am also heartbroken over my 11 year old yorkie becoming deaf right after using Mometomax for an ear infection.
    My vet said that it only happened one other time in his practice. I am so upset and I can only imagine how my yorkie feels that all of a sudden she can’t hear me say \let’s go for a walk\ and all of the other phrases she used to get so excited over. Now I have to teach her sign-language. So sad and it’s so not fair! On top of it all I just got the vet bill and I was charged $53 for those ear drops! He said he’s waiving it. Grrrrrrrrrrrrrrrr

  15. can a dogs ear get read after a weeks usage??? My parents have a 2 yearold Scottish Terrier and she was also prescribed this for her ear infection

  16. Dr. Michael Dym, VMD veterinarianJuly 15, 2011 at 10:29 pm

    There can be rare allergic reactions to any topical ear medications.

  17. My 15 year old lab mix had an ear infection so she was prescribed this medicine. She already had a little bit of a hearing impairment due to old age, but once she started taking this medicine she was completely deaf. We have to shake her to wake her up and it’s hard to call her inside if she can’t hear anything! I just hope she knows we still love her because I miss being able to talk to her. The vet told us her hearing may come back in a month or so. I have my fingers crossed!!!

  18. Dr. Michael Dym, VMD veterinarianAugust 24, 2011 at 10:28 pm

    Sorry to hear of this unwanted side effect of this medicine on your pet It is rare but does occur. Will keep my fingers crossed with you .Consider consulting a homeopathic vet in your state

  19. Momentex made my dog deaf. No warning from the vet. No excuse. I am so disgusted. She went into kidney failure after being prescribed enalapril. The \vets\ are going to kill my dog.

  20. Dr. Michael Dym, VMD veterinarianOctober 22, 2011 at 11:15 pm

    Sorry to hear about your rough luck with conventional drugs lately. May be good to consider perhaps homeopathic vet consultation to take different approach for your pet’s problems. To learn more about homeopathy see as well as my website Many homeopathic vets like myself do offer phone consultations.

  21. After reading all of the negative complaints about Mometamax, I thought it was only fair to say that, being in dog rescue, I have used this drug numerous times on many different dogs without ever having a dog become deaf. So, as Dr. Michael Dym has said so many times, any drug can have a rare negative effect and it appears that people who have experienced negative effects are all posting on this site, but I don’t believe that this reaction is the reaction experienced by the majority of users of this medication.

  22. Dr. Michael Dym, VMD veterinarianOctober 30, 2011 at 9:57 pm

    HI Linda: Thank you for sharing that comment. Being a conventional practitioner of many years experience as well, I have seen this topical drug, as well as its predecessor otomax, offer far more symptomatic relief to pets than this unfortunate side effect.

  23. It may be true that it helps most pets, but it’s devastating when your dog is the one who has lost it’s hearing because of it, especially when no warning that it was even possible was ever given.

  24. Dr. Michael Dym, VMD veterinarianNovember 1, 2011 at 10:10 pm

    I can definitely empathize with your situation. I am so truly sorry. Cases like this are why I also embraced and am so passionate about provding holistic and homeopathic medical treatment options to my clients.

  25. I brought my schnauzer in for a grooming and was told she had an ear infection. The vet had me put mometamax drops in her ears and now she is deaf! I am so angry that this has happened! It is ridiculous that this medication is being used routinely and causing animals to go deaf so often.

  26. My dog is deaf from mometamax, too. I am so angry and sad. The company that issued this drug should be sued!

  27. I am so disgusted to see so many pets affected by this drug! It is ridiculous and irresponsible on the part of the drug company and vets for continuing to use a drug with such devastating side effects!

  28. Dr. Michael Dym, VMD veterinarianDecember 31, 2011 at 10:58 am

    I am sorry to hear of your pet’s reaction to mometomax. Yes this is a possible reaction which occurs in rare cases.

  29. Dr. Michael Dym, VMD veterinarianDecember 31, 2011 at 10:59 am

    Thanks for sharing. This is rare but severe reaction.

  30. Dr. Michael Dym, VMD veterinarianDecember 31, 2011 at 10:59 am

    Thanks for sharing. Certainly not a drug I use as my first line medication in practice.

  31. Sorry, but it is NOT a RARE reaction. It’s all over the web, hundreds of entries from people who’s dogs are now deaf bc of mometamax!

  32. Our 12 year old Yorkie had ear infections and we also were given Mometamax for her. We noticed after about five days she could no longer hear anything. Now besides a cataract in one eye, one developing in the other, she cannot hear because of a medication that was supposed to help her. The vet just brushed it off and said perhaps it was a side effect to the medication but it should be temporary. After reading the other comments, I am very sad and not hopeful. I wish we had been told this could happen.

  33. Dr. Michael Dym, VMD veterinarianJanuary 21, 2012 at 12:02 pm

    I am sorry to hear of your pet’s unfortunate reaction to this product. This side effect does occasionally occur. In some pets the hearing may come back, while in other pets the hearing loss is permanent.

  34. Unfortunately I am another negative post. Took my such Schnoodle in for a check and my vet said he appeared to have bacterial infection and prescribed this medication without warning to possible side affect. Within 3 days he became completely deaf. Sad to see because he used to greet us at the door with wagging tail now I have to walk in cautiously not to frighten him. I just wish I would have known of alternative options and long term side affects.

  35. Dr. Michael Dym, VMD veterinarianJanuary 27, 2012 at 5:07 pm

    Sorry to hear about your dog. Unfortunately these side effects can occur with these drugs.

  36. Have a rescue cat, approx 3 yrs old, the doctor prescribed Mometamx 1 x per day in both ears, her Left ear has a major ear infection in it. It did have ear mites that due to the rpior owners neglect was left untreated. Now the problem has excalated !!! The cats ears both were “flushed” to get all the “junk” out of them. She came home on this med and Zenequin 50 mg(1/2 pill ) 1x a day w/her food.
    Now her face is swollen on the Left side/her left eye has a BLOWN Pupil !! She is walking/eating fine. But her peripheal vision is off because she can only use one eye now.
    The side effect for this med show these symptoms on other sites…. but, not the eye issue ?? ALSO _ Other sites Clearly Note not to use this med on Cats ??? Any ideas/thoughts ??

  37. Dr. Michael Dym, VMD veterinarianFebruary 2, 2012 at 12:56 pm

    I would take her back to the vet for a recheck. Facial swelling could be allergy or even tooth root abcess as well, in addition to eye will likely need treatment.

  38. My 11year old Shih Tzu was in for her check up Vet said she had a little infection in ear gave me Otomax for her .Put drops in at night dog was total deaf in morning ,Looked up Otomax and found out what it could do ,I flushed out the dogs ears to get the drug out ,took a week dogs hearing is back to about 80% hard to tell but much better ,Going to try Zymox hard to find in BC ,I can not understand why a Vet would not warn people of this obviously not rare reaction could possibly saved a lot of dogs there hearing if people knew what to watch out for

  39. Dr. Michael Dym, VMD veterinarianFebruary 3, 2012 at 11:09 am

    Thanks for sharing. At least it sounds like her hearing is coming back, which is great news.

  40. My 10 year old maltese had a horrible ear infection that was affecting her overall health severely. Mometamax played a large roll in her recovery and started to clear up her ears in just a few uses. She’s prone to ear infections, and I am using Mometamax again. Given her age, I think a risk of deafness is a small price to pay for a product that prevented me from having to make the decision to have her put to sleep or not. I’m very happy with the product and will continue to use it.

  41. Dr. Michael Dym, VMD veterinarianFebruary 6, 2012 at 3:52 pm

    Thanks for sharing your experiences with the product.

  42. Willow MorningskyMarch 19, 2012 at 5:19 pm

    David Max, you have obviously not used homeopathics as you would never make such an obviously ignorant statement. Homeopathics are extremely effective and never toxic or with any side effects.

  43. Dr. Michael Dym, VMD veterinarianMarch 20, 2012 at 1:17 pm

    THanks for sharing. I have found homeopathics very helpful as well.

  44. The vet just prescribed this medicine to my dog today because of a minor ear infection. I gave it to him tonight. Now I’m not sure if I should continue. I’m now afraid because of all these posts about deafness. Now I don’t know what to do!

  45. My dog is 23 months old btw.

  46. Hi Jack, I took my bottle, unscrewed the lid, dumped the contents into a dry trashbin, not the water waste, and threw the whole thing away. To me, personally, it’s not at all worth the risk. There are products that are effective without the risk.

  47. I decided to use it, BUT I’m extremely cautious about it. The doctor said to put it 2 times per day for the first 2 days but I decided to put it once per day. Also, I’m not generous with the amount I’m putting. I’m going to put just enough. I also will clean the ears every time I put a new dose in, so the old one will be gone, at least most of it.

    I also check his hearing very often. Saying words he usually gets excited about faintly enough for him to hear. As soon as I see something change with his hearing, I will stop the product right away.

  48. Dr. Michael Dym, VMD veterinarianMarch 23, 2012 at 2:10 pm

    Sounds like good advice to the audience when using this product.

  49. Dr. Michael Dym, VMD veterinarianMarch 23, 2012 at 2:11 pm

    Thanks for sharing. I find that zymox otic HC is equally as effective in most ear cases and much safer.

  50. Dr. Michael Dym, VMD veterinarianMarch 23, 2012 at 2:11 pm

    I would continue medication as directed unless you hear from your veterinarian. There are other treatment options such as zymox otic HC

  51. My yorkie’s vet prescribed mometamax because I told her that he was scratching and shaking his head a lot. I gave him ONE treatment when we got home, and within a few minutes his ears were bright red and swollen. His ears looked fine before I put those drops in. Had to get an ointment to help with the side affects of mometamax. I threw the bottle in the garbage…$40.00 wasted, and several trips back to the vet because of this med. THIS MEDICATION SHOULD BE BANNED!!!!!!!!!!!!!!!!!!!!!!!

  52. Dr. Michael Dym, VMD veterinarianMay 26, 2012 at 12:22 pm

    Yes this can rarely happen in sensitive dogs. I am sorry. Lucky that your yorkie did not go deaf which is even more serious reaction.

  53. If deafness is one of the reactions to this medication, why is it still used???? I guess a lawsuit would make them look at this medication!

  54. Pingback: DO NOT USE MOMETAMAX!!!!! Read entire blog first! - Forums - Yorkshire Terrier Community

  55. Dr. Michael Dym, VMD veterinarianMay 28, 2012 at 12:17 pm

    Good question but the warning is in the drug insert sold with the medication.

  56. My Blue Pit Bull has chronic yeast and ear infections. Mometemax always fixes the issue and can also be used on hot spots he bites with outstanding results. I am trying Zymox though because it is a lot cheaper. My PIt can still hear just fine.

  57. Dr. Michael Dym, VMD veterinarianJuly 19, 2012 at 9:29 pm

    Zymox is excellent product to try.

  58. I went to the vet last week b/c my cat had diarrhea, and along with meds for that, was prescribed Metamax for an ear infection. I was told just to “give a good squirt” in her ear (no measurement or # of drops). Her ear cleared up within just a few days, so I stopped administering it. The next day, she started sneezing violently whenever she stood up, her right eye watery, and exp’ced discomfort in her right nasal passage. I thought something might be lodged up there, but b/c it’s on the same side of the ear infection, I thought these new symptoms c/b related. I looked at the RX and saw I was supposed to give this to her for 10 days, so I gave her another dose even though I’d stopped 2 days before. Then I looked at the box. When I saw it was “for dogs only,” I immediately called the vet very concerned. It’s been 3 hrs and no return call so I did this search. Now I’m even more concerned. She’s 14, indoors, and never had anything stuck up her nose. I don’t know what to do.

  59. Dr. Michael Dym, VMD veterinarianSeptember 4, 2012 at 10:06 pm

    I would not worry. Mometomax is not dangerous to cats. As for your kitty’s sneezing, if symptoms persist, see your vet for possible antibiotic injection.

  60. Thank you. After further research and seeing warnings about getting the drug in the pet’s eyes, nose or mouth, I realized that might be the cause. When she cleans herself, she’s spreading the ointment from her ear across her face, so I think it got into those areas, causing her new symptoms. I cleaned the area with soap and water so hopefully that’ll help (along with discontinued use of the meds).

  61. Dr. Michael Dym, VMD veterinarianSeptember 5, 2012 at 5:01 pm

    Cleaning the area should help.

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    for his web page, for the reason that here every information is quality based information.

  63. My sweet yorkie who is 13 is deaf thanks to 4 applications of Mometamax. She had adjusted to cataracts and was a happy dog…now its difficult. She sleeps way too much. I am devastated. No warning from Vet. I researched meds and found many people and pets affected by this drug. I cannot believe you would say “in rare instances”. Well I am just beginning and when I am done the makers of the drug and the FDA approval will be gone!!!

  64. Dr. Michael Dym, VMD veterinarianJanuary 10, 2013 at 9:59 pm

    I am sorry to hear of the deafness of your little yorkie from mometamax. Fortunately I have not seen this much at all in veterinary practice but of course if your pet is one of the few, then that is of course too much.

  65. Dr. Michael Dym, VMD veterinarianJanuary 10, 2013 at 9:59 pm

    More reasons why I got into homeopathic and/or holistic vet medicine.

  66. Why do you keep saying this is rare. Rare should be 1 in 1,000,000, not 1 in 10. Give me a break. 1 dog going deaf is too many, find a new drug. This is horrible. The vet should be responsible for warning that older dogs commonly go deaf with this medicine. Pathetic…

  67. Dr. Michael Dym, VMD veterinarianMay 14, 2013 at 9:42 pm

    Hi Julie. I certainly understand your sentiments. Even if one animal has a side effect to a medicine, that is too many.

  68. I’m sorry about everyone’s negative experience with this drug. I just bought it today to treat my cat’s ears and after seeing the “only for dogs” label decided to do my own research.
    But here’s the thing, many prescription drugs have nasty side effects anyway, even death, and that includes drugs made for humans too.
    When you put a man made chemical into your system, or your pet’s system, you should at least anticipate negative side effects. Do not assume that it is 100% safe, even when told it is.
    And for anyone that wants to sue the company, you can’t. They warned you of deafness on the bottle. It isn’t their fault you didn’t read the warning label. The only thing you can do is sue the vet for not giving you that kind of information.
    You want to keep yourself and your pet safe? Do your own research, look at other’s experience, and make your own decision. Ask your doctor or vet to refrain from giving you or the animal the medication UNTIL you decided it sounds like something you want you or your pet to receive, you have the right to say no.

  69. Dr. Michael Dym, VMD veterinarianJune 12, 2013 at 4:52 pm

    Thanks for your comments.

  70. I was prescribed Mometamax for my dog’s ear infection. I started applying it last Thursday and by Tuesday she was totally deaf. She is a 12 yr old lab mix. I flushed the ears with a cleaning solution but she appears still deaf. I called the vet and they told me to discontinue the med. What great advice. They said they will investigate further when I bring her in for a follow up in a week or so. My fingers are crossed that her hearing will return. I am super upset that this med is not illegal. It obviously is making thousands of dogs deaf. I wonder how the CEO of the company that makes this poison would feel if his dog was made deaf from it.

  71. John, Our dog got his hearing back, we cleaned his ears twice with a cleaning/drying solution within a weeks time. If it does come back it may take a few weeks as it did with us. This drug should not be given to older dogs especially without the vet warning of the side effect. Candra, a lot of people trust the dr that they are not putting our loved ones at risk when we go in for help. It is not the patients fault because they did not read the warning label, dont minimize the travesty of thousands of animals going deaf because their owners thought they were doing the right thing in helping them based on trust given to the dr they paid to help them. Never in a million years would I have thought a cream to help my dogs ear infection would make him go deaf.

  72. Dr. Michael Dym, VMD veterinarianJune 20, 2013 at 12:58 pm

    Sorry to hear of your experience with this product. This side effect, although rare is quite serious.

  73. Dr. Michael Dym, VMD veterinarianJune 20, 2013 at 12:59 pm

    Thanks for sharing Julie. I wholeheartedly agree.

  74. Doc, thank you for providing this forum. However, you seem a bit like broken record when you repeatedly respond that this is rare side effect. You seem to be in denial that the product is unsafe. Or possibly you profit personally from its common use? What don’t you get about 1000s of dogs going deaf from it??????? If you are sincerely concerned, you should be leading an effort to ban or restrict it.

  75. Thanks for sharing your experience. It’s good to know it may be temporary.

  76. Hi Dr.Dym

    I just pick up a cat that left behind after my neighbor moved from his house and brought her back to health. I did not have the heart of leaving her outside in our 112 degree summer. She does shake her head and scratch her ear a lot. She also breath very deeply her belly goes in and out.
    She purrs a lot but I think that she has some allergies and cannot breath freely. I took her to a travelling vet who comes to our feed store in Glendale once a week. She found her very healthy except for the ears. She used a Q-Tip it was very dirty but dry. She prescribed Mometamax because she thought that she might have mites and infection. There is no drainage or fool oder. As I am an Holistic person I will not use this med. on my cat. So should I give her some Benadryl & Zymox with HC.I don’t know how much & for how long. Thank you Doc.

  77. Dr. Michael Dym, VMD veterinarianAugust 16, 2013 at 1:24 am

    HI Nicole…. I would use the zymox otic HC twice daily for 10 days, then twice weekly after that. I prefer the antihistamine chlorphenirimine in cats at dose of 2 mg twice daily as needed. Also consider DMG immune booster and proanthozone from 1800petmeds.

  78. Dr. Dym

    Just want to say thank you for your reply.
    I do have a question. For the twice a week is it also twice a day and for how many weeks.?

    I do appreciate your help. I wish you were closer I am looking for a Holistic Vet. – I will keep in touch letting U know how she is getting along..Thx again Nicole

  79. Dr. Michael Dym, VMD veterinarianAugust 18, 2013 at 12:31 am

    Hi Nicole. Thanks for your kind complements. Twice a day for 2-3 weeks, then twice to three times weekly. Also keep in mind many homeopathic vets do offer phone consultations if none in your area.

  80. Hi Dr. Dym

    Just wanted to give you some updates on Bella the adopted cat. Bella is doing much better. The ears are staying clean but she is still shaking her head, so I am going for a 2nd. week….She is very good taking her Chlorpheniramine Maleate. She is taking 1mg twice a day….Doing much much better. Her down side is that she is very aggressive and really going after my little 8lbs cat Tiggy. I don’t know if I am going to keep her but it is very hard to find someone who would take a sick animal.The only thing she got going for her is her beauty…..I was browsing on the internet and found some Homeopathic medicines
    What do you think about “Histaminum hydrochloricum 9C”for cats.
    Could I give her that instead of the Chlorpheniramine. don’t know how many pellets. Could I put it in her mouth as it would be difficult to do under the tongue or put it in her water I have a dog & Tiggy. Actually it might help Abby the Dog as she leaks her feet all day they are getting Red & Swollen.
    Thank you for all your help, I am very pleased…

  81. Dr. Michael Dym, VMD veterinarianSeptember 4, 2013 at 9:45 pm

    Hi Nicole You are very welcome. Glad I could help. I would not use the histamine homeopathic remedy, as they dont really work well in my experience and opinion. Perhaps consider natural calming agent like be serene from 1800petmeds. Let me know if any other questions.

  82. Took our bonnie to the vet for a ear infection. Vet prescribed mometamax. With-in 4 days she was completely deaf. The vet said her ear drums were swollen so we thought that was the problem having confidence in our vet we completed the treatment. took her back for a follow-up and told the vet about her hearing loss. Our vet checked her and said everything looked ok and her hearing should return. Our bonnie is 9yrs old and has been completely blind since 4. Her hearing is vital for her. I want to strike out at someone after reading all these blogs.I know that won’t solve anything so I will just pray that she gets better. I can’t believe that with all the terrible effects this drug has caused the vets just say it is rare. It doesn’t appear to be rare and I hope people read these blogs before they endanger their pet. They will get no help from the veterinarian who prescribes this poison.

  83. Dr. Michael Dym, VMD veterinarianSeptember 15, 2013 at 11:45 pm

    Hi Herb. Sorry to hear of your pet’s reaction to this product. That is why I typically go with more natural enzymatic ear products in practice such as zymox otic from 1800petmeds.

  84. I have been reading all of these posts and am appalled. Our 13 year old german shorthair was shaking his head a lot. Even though he had never had an ear infection I took him to the vet the day before I had to go out of town. The vet’s assistant examined him, said he did not have an infection but did have a lot of wax in his ears. She opened the box of Mometamax, showed me how to give him the drops and wrote the instructions on the outside of the box (12 drops, once a day to ears for 10 days). I passed the instructions on to my husband and went out of town for the next 8 days. When I came home our dog was deaf. When I took him back to the vet he was very unconcerned about it. Basically his reaction was, oh well this does happen occasionally. We don’t warn people about it, because then they wouldn’t use the medicine. There was no insert in the box (probably because the tech took it out when she opened the box and gave him the initial drops. There is no warning on the bottle or the box regarding any possible side effects. I am extremely upset about this. Our dog was a hunting dog which he is no longer able to do because of his deafness. Ever try to call back a dog that can’t hear you??? He is also very fast, so if he gets out the door before you and takes off you can’t whisle him back. If anyone knows of any pending legal action let me know. I would definitely join in.

  85. Dr. Michael Dym, VMD veterinarianFebruary 19, 2014 at 11:22 pm

    Hopefully many of these tragic hearing loss, due resolve over time, as long no other caustic chemicals used in ears

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  87. I posted back in January of 2012. My 12 year old Yorkie went deaf due to this medication. I now have a six month old Havanese who I am taking to the vet (a different one than I took my Yorkie to) because I think she has infections in both ears. I am so scared. Can anyone recommend anything?

  88. Dr. Michael Dym, VMD veterinarianJune 2, 2014 at 6:09 pm

    Try the topical medicine called Zymox otic HC from 1800petmeds which is excellent natural alternative.

  89. I am so upset after reading all these comments. My 5lbs 10 year old Maltese is now deaf after 2 days of mometamax. I am heartbroken. I feel like this is all my fault because I did not check the side effects of this medicine.
    I cannot believe such medicine is given when it has such serious side effects.

  90. Dr. Michael Dym, VMD veterinarianJuly 10, 2014 at 11:08 pm

    Fortunately Sophie, most of time the hearing loss is only transient.

  91. Thank you for your reply…
    I really hope it is only temporary, because so far, there are no improvements.
    do you know how long it takes for the hearing to come back?
    should i do any ear washes or anything like that? i m just so mad at myself for letting this happen. it drive me crazy

  92. Dr. Michael Dym, VMD veterinarianJuly 15, 2014 at 4:46 pm

    Most of time, hearing gradually returns

  93. I’m finding it really hard to believe that a DVM is recommending that people see a homeopathic vet. Homeopathy is pseudoscience and what this vet is recommending is out and out pure quackery. If you want to go to a homeopathic vet, then save your self some money and just turn on the faucet. There is no scientific basis for homeopathy. Not one homeopathic remedy has ever held up in a controlled, double blind scientific test.

    As for the Momentamax deafness. I think most people are looking at correlation and not realizing the dog already had severe problems that they just didn’t realize.

  94. Dr. Michael Dym, VMD veterinarianJuly 25, 2014 at 9:20 pm

    HI Heather. Hate to respectfully disagree with you, but I am a 23 year old presidential scholar graduate from two Ivy league schools in Cornell and Penn, as well as having 23 years clinical experience BOTH as a veterinary homeopath and traditional veterinarian. There are INDEED plenty of research available from non biased sources on homeopathy, as well as many of us with tons of clinical experience in treating rather severe pathologies with classical homeopathy. Before you put it down, try learning more about it, especially from veterinarians trained in both modalities. to learn more go to as well as as well as NO placebo here. As for the mometamax, unfortunately the risk of transient deafness IS REAL and has been seen in dogs previously healthy with good hearing, and I have seen this in my 23 years of doing this.

  95. Thank you, Dr. I felt really sad when reading Heather’s comments. Nothing was wrong with my Yorkie’s hearing before this medication. And I appreciate your alternative recommendations for my Havanese. Thank you.

  96. Heather, you obviously like to sound knowledgeable but know nothing about the subject you purport to be familiar with. I raised two children on only Homeopathics and herbs, NO medical profession at all. They were always far healthier than all the other kids… runny noses or colds, ever!!! Homeopathics are extremely powerful and effective. Please educate yourself before you do harm to others with your ignorance and pontification. It is simply a cruel and dangerous behavior.

  97. Dr. Michael Dym, VMD veterinarianJuly 26, 2014 at 6:04 am

    ODd Heather how you bring up 4 MAJOR POLITICAL ORGANAZATIONS OF VETERINARY MEDICINE, WHOSE AGENDAS ARE INFLUENCED BY MAJOR PHARMACOPIA, and NOT INDEPENDENT, unbiased studies IN the United States, the AVMA hardly is considered a well respected objective and independent authority. …. Try looking at the study done by my brilliant veterinary colleague Shelley Epstein, VMD, who has an AAHA certified VERY BUSY traditional and homeopathic veterinary hospital in Wilmington, Delaware……nanomedicine-part-2 on this idea of how homeopathic remedies work on a physics level in the patient, which is WAY deeper than the biochemical surface of the body. Again you should not put down something you know little about. I can list numerous other studies on homeopathy here, however for the blog readers who simply want to find VERY KNOWLEDGABLE practitioners of veterinary homeopathy, and read about one of the most brilliant i.e Richard Pitcairn, DVM, PHd, whose PHD is in IMMUNOLOGY….. go to and read about studies Dr Pitcairn has listed there, as well as the other two websites in my prior posting…. I am sure studies are listed there as well. I suppose these hundreds of often Ivy league trained BRILLIANT veterinarians, must have had mental health breakdowns, because as someone who also attends annual homeopathy meetings, I suppose the case conferences presented on cures with very deep pathologies must be placebo or power of prayer…..

  98. WillowMorningskyJuly 26, 2014 at 9:39 am

    Kudos, Dr. Dym!!!! Thank God for Veterinarians of your knowledge and quality. Our animal population is very fortunate to have individuals such as you and your peers. Let Heather choose her own path and we wish her well in her choices. As far as I am concerned, your above response quite adequately and thoroughly covers the issue to the point where anyone else reading these posts will be well informed enough to make their own choice. Indulging in extended conflict with those who choose paths other other than what I choose holds no productive outcome for my time spent. As long as there is clear and intelligent information countering the ignorant remarks of some, which you have so well provided, I will allow incoming readers to their own decisions and move on to other things with my time and efforts. Thank you, Dr. Dym.

  99. Dr. Michael Dym, VMD veterinarianJuly 26, 2014 at 3:31 pm

    Thanks so much Willow for your wonderful and kind compliments. I greatly appreciate it. IT has always bothered me how many out there, especially more traditionally only trained MD’s and DVM’s are so close minded on complimentary type of therapies, only believing what political organizations with other agendas want them to believe. The studies on homeopathy efficacy are out there, and as a start, blog readers can go to the websites I listed on the last posting. Also ironic that SO MANY drugs used in every day veterinary practice are NOT based on double blind placebo controlled studies, which in my opinion is so hippocritical, as that is their criticism of holistic therapies. For example the drug tramadol is used every day in veterinary practice for pain relief, yet there are NO DATA THAT SUPPORTS THIS USE?…. However clinically speaking we use so many therapies, not based on studies, but based on clinical experience and use….

  100. WillowMorningskyJuly 26, 2014 at 6:52 pm

    Russ, if you don’t want to use Homeopathics, don’t. If you just want to fight for the sake of combat, please take it elsewhere. When something works for people, it works. Double blind studies are erroneous and later mis-proven all the time. And people cheat. Trust in your inner self, Young Man. Follow your own core of integrity, experience and perception. Quit looking for truth and answers in the experience of others and the external world. If you have a need and want to learn about the efficacy of Homeopathics, try them. If you perceive beneficial results, use them again. If not, use something else. Don’t spend your life engaging in battles just for the sake of your desire to stroke your ego at the expense of someone else. You will not bring yourself an excellence of life in doing so. And you will not gain the respect of people by doing so. Learn to value your self for the person you are and conduct yourself in ways that you respect so that you know inside yourself that you have integrity. Don’t throw it out to battles with others to try to gain self- respect by winning. Be compassionate and care that other people are not trampled on by your need to win. Seek knowledge through experience and trust your own intuition. Choose your path for your own forward movement, not for what you feel is glory in proving yourself better than others. I hope you understand what I am trying to share with you.

  101. WillowMorningskyJuly 27, 2014 at 2:32 pm

    Dr. Dyn, I pretty much think that all these people, Heather, Russ, Eve, and now Joe, are all the same person just posting multiple times under different names to try to appear like they have a stronger case. The low level of education and lack of presented intelligence is consistent throughout each of the posts. Is there any way you can block or report these rude people so that the rest of us don’t have to be exposed to their mindless quests for combat? The spelling errors and grammatical syntax errors are the same in each of the posts which is why I am sure they are all the same person, Dr. Dyn.

  102. Dr. Michael Dym, VMD veterinarianJuly 27, 2014 at 4:17 pm

    I agree Willow. Person to contact at 1800petmeds is Vanessa, who can take care of this issue. Truly unfortunate for such emotional, uninformed comments and critiques, without any “objective” basis, and with no experience in what they are complaining about…..

  103. Dr. Michael Dym, VMD veterinarianJuly 27, 2014 at 4:31 pm

    Hi Joe….FYI….. papers-and-related-material I supposed this organization is full of formerly mentally competent veterinarians who went off the deep end…. See this website for documented papers…. as well as

  104. One good place to look for medical literature is PubMed (

  105. David Max…you’re the quack. Unltesz you have tried homeopathy, you have no voice on this matter,in spite of your education. I have experienced the positive results of homeopathy. It is appalling that you and your Ph.D. credentials are so very closed minded. I’m impressed and refreshed that a doctor who practices traditional vet medicine is unselfish enough to make such a recommendation. It is a reflection of his character and passion for animal health and well-being.

  106. David Max…you’re the quack. Unless you have tried homeopathy, you have no voice on this matter, in spite of your education. I have experienced the positive results of homeopathy. It is appalling that you and your Ph.D. credentials are so very closed minded. I’m impressed and refreshed that a doctor who practices traditional vet medicine is unselfish enough to make such a recommendation. It is a reflection of his character and passion for animal health and well-being.

  107. Dr. Michael Dym, VMD veterinarianAugust 17, 2014 at 2:08 pm

    Hi Debbie. Thank you for the kind compliments. My teacher on this regard, and country’s leading expert on veterinary homeopathy, Richard Pitcairn, DVM, phd actually has a phd in immunology!!! I have found that trying to argue with people set in their rejection of homeopathy not very helpful, and never helps advance the discussion.

  108. I’m so glad I read these comments. In Aug 2011, my then 7.5 year old English bulldog was shaking his head, etc. Took him to the vet, was given Mometamax, which I administered as prescribed. I have a busy house with pets and kids, and at some point I realized my dog couldn’t hear very well anymore, had to say his name very loudly. I thought that I had somehow neglected him and not gotten him treatment in time because I hadn’t noticed a problem or something, and that an ear infection had damaged his hearing. Have felt very guilty about that ever since. Fast forward 3 years to last week, when bulldog is shaking head, panting, red ears, etc. It’s Friday night, so I go looking in our medicine cabinet for help. Find the Mometamax prescribed Aug 2011, administer drops. For some reason, I decide to look up the medicine online, which leads me here. I see all of these comments about deafness in older dogs, and I suddenly realize what happened! Not my fault after all!! Luckily my dog still has some hearing, but he developed cataracts at about the same time, so he really seemed to age overnight, poor thing. Thank you everyone for sharing your experiences. I’m glad to know this and to keep away from this medicine. Mometamax surely does work for some dogs or it wouldn’t still be around, but I’ll be steering clear of it in the future. Aside from the homeopathic drops mentioned, I’m wondering if there are other remedies for ear trouble, like maybe hydrogen peroxide?

  109. Dr. Michael Dym, VMD veterinarianAugust 28, 2014 at 6:27 pm

    50-50 mixture of white vinegar and water is also affective for some of ear issues in dogs….

  110. I took my Scottie in for routine exam, I asked the Dr to check his ears because he had been shaking his head more than usual. He told me he \probably\ had a mild ear infection and cause me an ointment to put in his ears, otibiotic ointment, after a couple of times use I noticed that he wasn’t hearing us and at first assumed that it was due to the thickness of the ointment. Then I started looking at the insert and saw where under warnings it stated that it could cause temporary or permanent deafness. I pray this is temporary, I discontinued the medication immediately, it has been two days and no change (I did wash his ears out with a clean ear solution hoping to get the ointment out,. Is there anything else I should do? And do I need to look into any other medication for the \possible\ mild ear infection? How long should it take for hearing to get better if it is temporary????

  111. Dr. Michael Dym, VMD veterinarianSeptember 24, 2014 at 10:32 am

    HI Teresa. Sorry to hear about your dog’s adverse reaction. Usually the hearing returns over a few weeks in most cases.

  112. Thanks for your response. I will keep my fingers crossed that he will be better in a few weeks! Should I continue to wash out ears or leave him alone, he doesn’t want me to touch his ears right now and I hate to bother him if it is not necessary.

  113. Dr. Michael Dym, VMD veterinarianSeptember 26, 2014 at 9:42 pm

    I would leave him alone, at least for the next several days

  114. My dog and I just returned from the Vet; since using Mometamax she has gone deaf, as well. I am now seeing all of the comments from upset parents who experienced the same tragic and unexpected outcome. I am looking to see if there is a lawsuit against the company because I cannot imagine that with this number of clients suffering such an extreme side effect the company has not been subject to a class action lawsuit for continuing to profit from the sale of the product. If someone is aware of a suit can they please post information on it here? Thank you. In the mean, I will look into the homeopathic suggestion; anything to help! Thank you, doctor, for hosting this discussion.

  115. Dr. Michael Dym, VMD veterinarianNovember 11, 2014 at 3:20 pm

    You are very welcome….

  116. Pharma QA SpecialistJanuary 18, 2015 at 4:10 pm

    The only way to change the warnings and indications on the label and on the product insert are to file complaints with the manufacturer (Schering-Plough Animal Health) and the FDA. EVERY SINGLE ONE OF YOU NEEDS TO TAKE THIS ACTION REGARDLESS OF THE DATE OF USE. Retain a copy of the paperwork from the pharmacist who provided the medication (prescription), document the lot number and expiration date (printed on the rounded edge of the plastic bottle), and take clear pictures of EVERYTHING- the bottle, the lot/exp, your pet’s visual issues. If Schering Plough asks you to return the product, DO NOT. They will most likely NOT run any analytical tests to help you or your pet. They will most likely just take pictures and log the sample into a documentation system then discard it unless they have been required legally to do more (which as of this message, they have not). If they claim that they WILL run tests, request a list (on Schering Plough letterhead and with a signature of one of their quality assurance managers- no one less than manager will do) of the tests they will perform on an opened, uncontrolled (meaning no legal proof of proper storage once it left the pharmacy) tube of their product. Make certain the letter also states they will provide you with test results including a date by which ALL results will be provided to you. If they will not provide this for you, KEEP THE SAMPLE. I rather suggest that you store the medication refrigerated until someone finally files a class action suit. Last advice, keep a record of EVERY communication you have with Schering-Plough including the date/time/method of contact (email, telephone/USPS/etc.) and then name/title of the person(s) with whom you speak. Keep ALL medical records for you pet. And pray that these actions help remove this medication from the list that your vet is allowed to give. You also might want to say adios to your vet- and tell them exactly why- because they will still provide this medication to other customers. Watch how quickly your vet stops offering the medication…..

  117. There needs to be a class action lawsuit for the deafness caused by Mometamax. They tell you over the phone that deafness is rare. This is because people are not reporting it to Merck or to the FDA. Veterinary clinics are not reporting it to Merck or the FDA. If everyone reported it it would not appear to be so “rare”! If this was happening to human children it would have already been pulled off of the market. Everyone who has experienced deafness due to Mometamax in their dog or animal please contact MERCK. Do a search for Mometamax and you will get the drug website and their contact information. Call them and report it because then they are legally required to report it to the FDA. Tell your vets to report the side effects of deafness to Merck. They will offer to reimburse you for the exam. If you take compensation then more than likely you could not participate in a class action lawsuit.

  118. Deafness from Mometamax is underreported. People need to report it to the company and the FDA. I asked my vet if he had reported the cases of deafness he had and he said “no”. Adverse reactions to drugs are supposed to be reported. Deafness is an adverse reaction. My vet acted like it was no big deal and that it should only last a couple of months. Being there for 2 months would be a big deal to me!

  119. The side effect of deafness from Mometamax is severely underreported by vets who don’t take the time and pet owners who don’t know to report it. It is an adverse reaction and should be reported. Veterinarians are negligent if they do not report an incidence of deafness after using Mometamax.

  120. Been over four months now since my Scottie lost his hearing due to the mometamax and no change, unfortunately I have to accept that he will never get it back (as I was told if he didn’t get it back within three months he never would) I totally agree with the fact that this medication should be removed from the market. It makes no sense to prescribe a medication that causes more harm to an animal. Its Cruel –

  121. Please report this to the manufacturer and thr FDA.

  122. Please report this to the manufacturer and the FDA.

  123. Please EVERYONE who has experienced any deafness with Mometamax whether hearing has returned or not, report this to the manufacturer AND the FDA.

  124. I am just devastated that our 11 year old German Shepard has also experienced loss of his hearing. I have already filed a report with Merck. May or may not get any hearing back is what they said and it can take 2 to 3 months. If this was your baby or child?? Would you find this acceptable. Completely disgusted! I would of never allowed it to be administered if I had any idea of the side effects. Someone should be held accountable and this should be taken off the market.

  125. Has your dog regained any hearing?? I am in the same situation with our dog and just sick about it.

  126. Please ask your vet to report all cases of deafness due to Mometamax to the FDA. Also, it wouldn’t hurt for you to go to the FDA website and look for the Animal Health Division and download the forms and report it to them also.

  127. Dawn, please report this to the FDA division of animage health. Until pet owners and vets report every incidence, it will continue to happen. It is not as rare as they say!

  128. My dog still has not regained his hearing. Sometimes we think he hears, but 5 minutes later he can not hear anything. I am writing to all the veterinarian associations to ask them to enc I urge vets to report deafness due to Mometamax in any degree whether the dogs regain hearing or not. I encourage everyone who reads this to contact every association they can and maybe if we make enough no ways everyone who reads this to contact every association they can and maybe if we make enough noise they will start looking at this medicine. there have been many lawsuits about send some my lessonthere have been many lawsuits about gentamicin causing deafness in humans. I am devastated that my older dog may have to live his last few days deaf because of a bad drug.

  129. Thank you for that advice! I wanted to provide an update on Merck’s handling of my case.

    As of today, Feb. 19, 2015, I have received one call from the “Dr.” at Merck regarding my case. They informed me that I would be receiving a check to reimburse me for the cost of the medication. I received the check with a carefully and strategically worded letter that infuriated me.

    The letter does not indicate, as the Merck doctor did, that the offer is to reimburse for the cost of the medication, but rather
    “…to reimburse you for the costs associated with MOMETAMAX and your pet [pet’s name]. This payment is offered as a good will gesture and does not constitute an admission of liability on the part of Merck Animal Health…..Endorsement of this check settles case #[case number] and releases Merck Animal Health and any associated entities from any liability relating to this matter.” It is signed by Brett Begley, DVM of Merck Animal Health. I am furious at the deceitful representation of the purpose for the check. Clearly I am not endorsing it, despite my confidence that it will be the only compensation I or my dog will receive for this.

    When medications are presented to humans, the advertisements inform the public of several potential side effects, even the most minor, yet a prescription that has caused complete loss of a major sense, of vital importance to animals in particular, for so many of its clients and there is no requirement for verbal warning by the prescribing doctor or even a bold sticker on the medication bottle to ensure that the decision to administer is an informed one. This is disgusting.

    I appreciate Joyce’s comment that every victim should file a report with the FDA so an accurate representation of the frequency and outcome of these occurrences can be tracked and hopefully therefore not ignored.

    It has been three months and my dog has not regained her hearing as Merck indicated she likely would. It does appear that very recently she began to hear some noises but cannot decipher where it is coming from or who/what the noise is originating from. What has occurred since her sudden deafness is an increase in sleeping (in my opinion related to her not hearing any noises to wake her). Being sedentary now seems to have led to an increase in the severity of joint stiffness/arthritis.

    Everyone please report your case. Thank you and I wish your pet’s health and happiness.

  130. Aileen, unfortunately when you accept payment, I don’t believe you can be part of any lawsuit that may arise. My dog also sleeps more since being deaf. The drug company is only worried about their loss of income as my vet, who is only 1 of thousands, says he prescribes it everyday because it works fast. Joyce

  131. We are just devastated! We took our little bischon into the Vet for symptoms of an ear infection. The Vet examined and took an ear swab to confirm it was a yeast infection and prescribed Mometamax. After using it as prescribed for 8 days she is now totally deaf. We were not warned of this side effect and had we have been, would have chose another option. Mometamax should be taken off the market and not prescribed ever! I cannot express enough how upsetting this is. We were told by the Vet it is possible her hearing may return after 3 or 4 months and then prescribed Fish Oil 1000 I.U and Vitamin E 200 I.U. three times per day. Has anyone been fortunate enough to have their pet’s hearing restored over time?

  132. Please report this to the FDA Division of Animal Health. Until all the deafness is reported to the FDA by vets or pet owners, it will continue to be prescribe. You can look up the FDA on the internet and download the form for the report.

  133. I just spoke again with the Vet and she said in her 20 year career as a Vet, deafness due to this medication happened only once. She further stated that she had spoken to the drug company representative and they offered to reimburse us for the cost of the medication and 2 vet visits. I am interested in a class action law suit against this company just in reviewing this web site. I will refuse the compensation if it does not allow me to participate. I have another apt with another vet this afternoon.

  134. Otomax just made my male deaf. Complete game changer. Im completely pissed, although I had him trained in two languages and hand signals, things are 100% different now. Seemingly sucked the life outta him, very sad. As many said previously I wasn’t warned of the possibility. My female seems to recognize this and seems to try to help him and also begun to challenge the lead dog. What I got? A free vet visit when I brought him back in and some free wash for his ears, which he’s completely terrified of.

  135. Ryan please report this to the FDA and encourage your vet to report all cases. You can search on the internet fir There is an animal health division. Until these are reported, nothing wI’ll be done.

  136. Dr. Michael Dym, VMD veterinarianMarch 18, 2015 at 1:43 pm

    So sorry to hear of this unfortunate side effect in your kitty.

  137. Dr. Michael Dym, VMD veterinarianMarch 18, 2015 at 2:00 pm

    So sorry Sandy to hear of your experience with this product. That is why I dont use it in my clinical practice.

  138. Dr. Michael Dym, VMD veterinarianMarch 18, 2015 at 2:01 pm

    I am so sorry to hear of your experiences with this product.

  139. My 10.5 year old lab had a double ear infection and the vet prescribed him Mometamax. We gave it to him for 4 days and then i realized he was going deaf so we stopped 3 days ago, reported to our vet today who is looking into this…and now just went online and saw all these posts. He can no longer hear. We used mineral oil to clean out his ears in hopes that it would remove any Mometamax.

    Will his hearing be restored after a period of time or is this irreversible? Like everyone else, I am beside myself right now. Thanks-Clark

  140. Dr. Michael Dym, VMD veterinarianMarch 24, 2015 at 12:06 am

    Hopefully the hearing will slowly be restored over coming few weeks. Best to followup with your vet and the drug company

  141. Joyce, if you find a way to pursue this further to get this poison off the market or learn of a class action lawsuit, I would love to be a part of it. My 11 year old American Eskimo was given Mometamax for a yeast infection in February. After that he lost about 25% of his hearing. The vet said it was due to old age although his hearing was perfect prior to that. I chalked his hearing loss up to the infection. A week ago he was given it again for another yeast infection. Five days later he was totally deaf. I am sick!!! I have already called Merck and have a case but what will that do? This is NOT rare. When I went to the vet for an ear flush, I was told that they had three cases in three weeks of dogs going deaf. Why had they not warned me? Something has to be done!!!

  142. I have a 19 yr. old Jack Russell who is being diagnosed with a vulva yeast infection. Dr. Prescribed Mometamax to be inserted daily for a week into her vagina …..everything I’m reading about this med is stating to be used in ears. We suspect she has obtained yeast infection from the antibiotics she took a couple weeks ago for a UT. Afraid to use this without some reassurance…..anybody have a thought?

  143. I too have experienced the effects of Mometamax. It was prescribed to my dog and a week later he is now very hard of hearing. Sometimes he can hear if I’m loud and other times not at all. I’m beyond pissed!!! My little guy used to have excellent hearing. Going to the vets on Monday. The tech on the phone said that what they did shouldn’t have any thing to do with his hearing and that’s it’s probably a coensedense. Yeah right. He isn’t even 3 years old!!!

  144. Dr. Michael Dym, VMD veterinarianMarch 29, 2016 at 4:37 am

    Sorry to hear about his hearing loss. Hopefully the hearing will return gradually on cessation of the medication

  145. My lab mix developed a yeast infection in both ears following a round of simplicity as a prophylaxis following an attack by another dog at a canine day care, resulting in numerous lacerations to one ear. He recovered from the ear lacerations but the noninjured ear necessary quite sore about 3 weeks later. The vet took a sample from the ear and diagnosed a yeast infection. Mometamax was prescribed and I administered it faithfully for 6 days.

    Three days ago he was less responsive to verbal commands and by the next day he could not hear at all. Loud noises that normally startle him no longer elicit any response. He sleeps a lot now and will not venture out of the yard for walks. He used to love walks.
    I called the vet and was told deafness happens rarely and he might not regain his hearing. Don’t believe the ‘rare’ part.

    I will definitely report this to the FDA. Having worked for a pharmaceutical company, I know this is the best way to report an adverse event whether human or animal.

  146. My lab mix developed a yeast infection in both ears following a round of simplicef as a prophylaxis following an attack by another dog at a canine day care, resulting in numerous lacerations to one ear. He recovered from the ear lacerations but the noninjured ear became quite sore about 3 weeks later. The vet took a sample from the ear and diagnosed a yeast infection. Mometamax was prescribed and I administered it faithfully for 6 days.

    Three days ago he was less responsive to verbal commands and by the next day he could not hear at all. Loud noises that normally startle him no longer elicit any response. He sleeps a lot now and will not venture out of the yard for walks, which he used to love.
    I called the vet and was told deafness happens rarely and he might not regain his hearing. Don’t believe the ‘rare’ part.

    I will definitely report this to the FDA. Having worked for a pharmaceutical company, I know this is the best way to report an adverse events whether human or animal.

  147. Sorry to hear about your dog’s unfortunate reaction. Often the hearing can come back with time, but I would definitely report the reaction

  148. Hello-
    I understand there is Zymox Otic Pet Ear Treatment with Hydrocortisone and without Hydrocortisone. I have a cat who has recurring otitis, which one should I use?

  149. Has anyone’s dogs hearing come back? This just happened to my dog.

  150. Hi Tracy. So sorry to hear of your dog’s hearing loss after using this product. I have seen many dogs’ hearing come back gradually with time. No way to predict, however.

  151. My vet just prescribed this for a skin infection, it could be bacterial or fungal. Has anyone heard of using this OUTSIDE of the ear(s)??? I can’t imagine any bad effect of using this on the skin on his belly BUT I am worried/concerned that 1) It seems to have caused rampant deafness, and 2) I have yet to read of ANYONE having used this for an infection on the dog’s skin. So, should I be concerned????

  152. I’m surprised that NO vet had chosen to use SUROLAN, for the ear infections mentioned above. This is what makes me question why the vet prescribed the MONETA MAX for his dermal infection. So next time, ask about the Surolan – I personally haven’t heard of deafness associated with this medication. Am I right in thinking that this medication (Surolan) is safer than Mometamax?

  153. When I come on to this page I received a warning message from Norton that it detected a virus there. Is there an email address I can send a screen capture of the virus details to your administrator for their review and removal of the problem on your side? I did a full screen capture of the entire virus details.

  154. I would just call and connect with Vanessa Pino on the main 1800petmeds number, whom you can tell about your concerns

  155. Did the hearing return? Our 10.5 year old German Shepherd baby is dealing with it right now. We finished the med 5 days ago and he has not been himself and it not responding like normal. We contacted Merck, our vet and the FDA. Very worried about him!

  156. Very often the hearing returns gradually over time. However definitely wise idea to contact drug manufacturer for assistant on this

  157. My dog had perfect hearing before being given this terrible toxic medication. Instant deafness. I was told the same BS speal as everyone else. NOONE TOLD US OF THIS POSSIBLE SIDE EFFECT. IM INFURIATED AND WILL NOT STOP UNTIL THIS “medication” is taken off the market.

  158. My 12.5 year old lab went suddenly and completely deaf after 4 doses of Mometamax. My vet has been very unhelpful. I would like to know if there are supplements that would help her recover her hearing. A treat dropped in her bowl used to awaken her from the other room, she has a large vocabulary, and she always barked at the doorbell or knocking, even if it was on the television. She barked at the doorbell Th after one dose. Three doses later, and she could hear nothing. I am calling the drug company in the morning. My vet obviously didn’t read the insert warning about geriatric dogs and didn’t offer to flush her ears or advise me to do so. I question whether she should continue with more eardrops, and will probably pay to take her to another vet Monday to reassess her ear infection and see about treating it in a way that will not endanger her hearing more. Sudden deafness is very frustrating.

  159. My cat, 16 or so, went on Mometamax a week ago. Yesterday I noticed she could not hear me. Her eardrum seems to be intact – it was a week ago anyway. Will she get her hearing back? What are the chances. Someone needs to stop this horrible drug. It was an absolutely sudden deafness. She was fine on Sunday night and on Monday morning she could not hear a thing. I am so sad for Sadie.

  160. I think too a class action suit. Please…let’s keep other animals from going deaf. We are supposed to sit back and ignore what they did to the the creatures we love ???

  161. HI Irene. So sorry your pet had this rare reaction to this product. Certainly I agree that the warning of his possibility should be in BOLD print. Some pets do indeed recover their hearing if the product is stopped over time.

  162. My dog was given Mometamax by his vet last week to treat an infection is his right ear, then I found he went deaf. I called his vet and was told this could be due to a rare side effect of the drug and asks me to stop the ear drop immediately. I got online and found deafness caused by Mometamax is NOT RARE! Why is this drug still on the market????!!!!! I feel so desperate and don’t know what to do to help my dog recover except for preying. I contacted Merck and filed a FDA report. I want to know what else we can do to take this drug permanently off the market and stop it from ruining more lives!!!

  163. As with any drug, pesticide, vaccination, etc rare and serious side effects may occur in sensitive patients. So sorry that your canine companion is going through this, but best I can advise is to contact the drug manufacturer, and perhaps they can have bigger warnings in the medicine’s packaging of this possibility

  164. So sorry your canine companion is going through this. Any drug, pesticide for heartworms/fleas and/or vaccination may rarely cause severe reactions in sensitive patients. Best thing I could tell you is to contact drug company and see if they can have larger warning in the package insert on this

  165. My adult male miniature Schnauzer was prescribed Mometamax in April 2016. Directions were to apply five drops in the affected ears once daily for 10-14 days. After several days noticed that he was not coming when called but thought that was because the fluid in his ears from the medication kept him from hearing me. To me at the time his not hearing me was similar to having water in his ears but when the medication dried out surely he would be okay. That did not happen. Days later I walked into the house and he was resting in his bed but never heard me come in. Stood there calling him and he did not respond. Stood there shouting and he did not respond. Stood there one room away and tried tapping then stomping my foot on the tile floor and still no response. He had gone completely deaf. It’s now May 2017 and his hearing has not returned. The vet said his hearing loss was probably due to normal aging process since he was over 10 years old. No it is not, normal hearing loss is gradual. Sweet dog lost his hearing due to darn ear drops. He now will walk through the house looking for me until he makes sight recognition but no response to being called. Feel stupid that it didn’t occur to me until today to research Mometamax on the internet but the damage is done. Poor little dog.

  166. My 16 year old cats ears had been suffering with lord knows what for almost ALL his life! Took out grain and fish, tried many different meds, then different vets, etc.. Finally, found a vet who tried him on Mometamax 15mg. He is now so wonderfully happy, he’s always rubbing his ears on me which for obvious reasons, he never did before. I thank my vet every day and this product for helping my baby love, find relief!

  167. Hi Linda. So sorry to hear of your experience with this topical antibiotic. With these topical formulations that have gentamycin in it, and/or possibility of damaged ear drum already, this occasional complication can sadly occur

  168. Hi Deb. This topical medication can be quite helpful in many types of ear infections in dogs and cats. Sadly as you see on these posts, rare impaired hearing side effects can occur

  169. I just emailed Merk and asked why they do not disclose that loss of hearing is not rare. If it happens in more than a few pets it is not rare. Now I will look up FDA and make a complaint. I am confident my Vet didn’t know. She has been taking care of my dog for years. She is a senior dog and her hearing wasn’t great but when you spoke loud she could hear. Now nothing. I am absolutely devastated.

  170. HI Sheila. So sorry to hear of your experience with this topical ear medication. Let us know how your inquiries go.

  171. Am crushed. Sadie Girl my dog was given this for ear infection which was a yeast infection I didn’t really notice until about the 10th day that she was not hearing she was given this for 14 days in both ears she is deaf she cannot hear anything. I’ve been praying that she will get her hearing back she had great hearing now she hears nothing she is in a silent world my husband and I are very upset there is no antidote to help her we are praying that it will come back she looks so lost and sleeps way too much now I am very upset over this we did report it to the FDA there are many cases my heart is broken for her

  172. HI Rose. So sorry to hear about your dog Sadie. Hopefully the hearing will come back slowly over time as it does in many pets

  173. Comment after comment after comment about my dog going deaf. I have a deaf dog now he was blind to start, now he’s helen keller! . Can you imagine the horror my dog is living now? How can this article stand and say “deafness is rare”??? In my experience 100 % of the dogs given this med have gone deaf. Somebody ought to sue anyone who doesn’t mention the huge probability of deafness from taking this medicine. That is B.S!

  174. Hi David. Sorry to hear about your dog’s deafness post using this product. In fact, I have not used this product in years as there are lots of safer topical antibiotic/steroid preparations now available since this blog was written many years ago.

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