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Mometamax Otic Suspension

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15 gm Bottle
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Product Info
How to Use
Customer Reviews
Product Info

What is Mometamax Otic Suspension?

Mometamax Otic Suspension is a once-a-day treatment for ear infections. It's an advanced formula that includes a combination of medications with antibacterial (gentamicin sulfate), anti-inflammatory (mometasone), and antifungal (clotrimazole) properties. It is used in dogs for the treatment of otitis externa when caused by susceptible fungi or bacteria. Mometamax Otic Suspension may be used for purposes other than those listed here. Mometamax requires a prescription from your veterinarian.




  • Treats ear infections caused by bacteria or fungus
  • Also used to reduce inflammation in the ear
  • Dropper bottle includes a long tip, which makes administration easier and less stressful

How does Mometamax Otic Suspension work?

The ingredient gentamicin sulfate is an antibiotic that is effective against a wide array of bacteria. Clotrimazole is an antifungal agent that is used for the treatment of dermal infections caused by various species. Mometasone is a synthetic hormone that treats inflammatory skin disorders and allergic reactions that your pet may have.


Avoid getting Mometamax in your dog's eyes, nose or mouth.

Brand Name:

Mometamax Otic Suspension (Merck)

Generic Name:

Gentamicin sulfate, Mometasone furoate, Clotrimazole

What is the most important information I should know about Mometamax Otic Suspension?

Mometamax Otic Suspension is a prescription medication FDA approved for use in dogs only. It is available in 15 gm plastic dropper bottles. Use this medication for the full amount of time prescribed by your veterinarian, even if your pet appears to be better. Symptoms may improve before the infection is completely healed.

What should I discuss with my veterinarian before giving Mometamax Otic Suspension to my pet?

Tell your veterinarian if your dog is pregnant, allergic to any of the ingredients in Mometamax Otic Suspension, has perforated eardrums, or is currently taking any other medications, including over-the-counter medicines, vitamins, minerals, and herbal products.

How should Mometamax Otic Suspension be applied?

Shake well before use. The usual dose for dogs weighing less than 30 lbs is 4 drops into the ear canal once a day. For dogs weighing 30 lbs or more, place 8 drops into the ear canal once a day. Therapy should continue for 7 consecutive days. Avoid getting this medication in your pet's eyes, nose or mouth.

What are the potential side effects of Mometamax Otic Suspension?

Side effects associated with this medication are related to the individual ingredients. Gentamicin, while absorbed poorly from the skin, when applied topically for long periods of time to large wounds, burns or denuded skin has a potential for reversible or irreversible ear and kidney toxicity. Hearing loss (usually temporary) may occur. Discontinue this medication and consult with your veterinarian if hearing loss, head tilting or dizziness are noticed. Redness of the skin, stinging, blistering, peeling, fluid retention, itching, hives and general irritation of the skin have been observed occasionally in humans following the use of clotrimazole. Other side effects may also occur. Talk to your veterinarian about any side effect that seems unusual or bothersome to your pet.

What happens if I miss giving a dose of Mometamax Otic Suspension?

Give the missed dose as soon as you remember. If it is nearly time for the next dose, skip the missed dose and resume the regular dosing schedule. Do not double the dose.

What happens if I overdose my pet on Mometamax Otic Suspension?

If you suspect that your pet has received an overdose of Mometamax Otic Suspension, consult your veterinarian or emergency veterinary clinic immediately.

What should I avoid while applying Mometamax Otic Suspension?

Avoid using any other medications in your pet's ear unless instructed to by your veterinarian. Do not use Mometamax Otic Suspension in dogs allergic to it or any of the individual ingredients. Use with caution in pregnant animals. Do not use in dogs with perforated eardrums. Discontinue use of this medication if hearing loss is noted during treatment. Use of this product beyond the recommended dose of 7 days may result in delayed wound healing.

What other drugs will affect Mometamax Otic Suspension?

Avoid using other ear medications without first talking to your veterinarian. Do not use concurrently with other corticosteroids or aminogylcoside antibiotics. Drugs other than those listed may also interact with Mometamax Otic Suspension. Talk to your veterinarian or pharmacist before taking or using any other prescription or over-the-counter medicines, including vitamins, minerals, and herbal products.

How to Use

Mometamax Otic Suspension Directions:

  • Mometamax Otic Suspension is a prescription medication used in dogs for the treatment of otitis externa when caused by susceptible fungi or bacteria.
  • Mometamax Otic Suspension is a combination of medications with antibacterial, anti-inflammatory, and antifungal activity.
  • Mometamax Otic Suspension is used in dogs only. Do not use in cats.

Prior to use, the external ear should be cleaned and dried, and excessive hair should be clipped from the treatment area.

Under 30 lbs
Shake well before use. The external ear canal should be thoroughly cleaned and dried before treatment. Verify that the eardrum is intact. Place 4 drops into the ear canal once daily. Therapy should continue for 7 consecutive days.
Over 30 lbs
Shake well before use. The external ear canal should be thoroughly cleaned and dried before treatment. Verify that the eardrum is intact. Place 8 drops into the ear canal once daily. Therapy should continue for 7 consecutive days.
Do not use!
Do not use!

Store between 36°-77°F (2°-25°C).


Mometamax Otic Suspension Ingredients:

Mometamax Otic Suspension:

Active Ingredients (per gram): Gentamicin sulfate, USP equivalent to 3 mg gentamicin base; mometasone furoate monohydrate equivalent to 1 mg mometasone; and 10 mg clotrimazole, USP in a mineral oil-based system containing a plasticized hydrocarbon gel.

Customer Reviews
Mometamax Otic Suspension is rated 3.8 out of 5 by 79.
Rated 1 out of 5 by from Caused deafness DO NOT USE PRODUCT Vet recommended for 5 drops each ear for 7 days. On day 6, noticed hearing lost. Vet from Banfield or Petsmart There are 75 reviews with 25 saying "causes deafness" DO NOT USE PRODUCT
Date published: 2017-02-12
Rated 5 out of 5 by from Thankfully something that worked! I have a 2yr old Sharpie/black lab mix. For the past 6mo. YES, 6mo! My dog has had an ongoing ear infection. He had been on 3 different oral antibiotics. 2 of which they tried treatment twice. He had to be placed on steroids a few times because the swelling was so bad. On two separate occasions they had to give him pain medication just so I could clean the ear. A friend told me about mometamax and swore by it. At this point I was willing to try anything. I asked my vet and they finally agreed to try it. The first 4 days on treatment I didn't see any changes but almost over night his ear cleared up. Little to no drainage, ear wasn't red and inflamed, I could clean it without him crying. By the end of treatment his ear cleared up. The only difficult part of the medication was the applicators tip. Because his ear was so inflamed it hurt him to have the tip go into the ear. Making it impossible to count 8 drops. Hopefully one day they can provide prefilled tubes for easy administration. Otherwise, I definitely recommend this product!
Date published: 2016-05-19
Rated 5 out of 5 by from The best product we've tried yet! My poor pitbull Apollo gets ear infections quite frequently. We've tried all kinds of ear drops and cleansers and nothing seemed to be working. When I started working at a Veterinary Hospital, I decided to bring my pup to work with me one day to have a doctor check out his ear. I told them about all the different things we had tried and they prescribed Mometamax. I asked them to compare Mometamax to what we had used previously and they said that the Mometamax has a certain steroid in it (which is why you need an Rx for it). It was a little pricey but SO worth it because it cleared my baby's ears up in about a week! Besides the fact that it works, my favorite part about the product is the bottle it comes in. All of the cleansers we tried would have these small, wide nozzles that would make a mess and we were never sure if the drops were applied properly. The tip of this bottle is super thin and long and slides right into the ear canal. Since its so small, your dog won't be as irritated by it and hopefully won't squirm around as much! I highly recommend this product!
Date published: 2015-11-22
Rated 5 out of 5 by from Awesome I highly recommend this product. My dog Dakota, has reoccurring yeast infections, and this works wonders for her itching and digging at her ears.
Date published: 2015-02-23
Rated 5 out of 5 by from Great product best ear infection product for my dogs!
Date published: 2015-01-18
Rated 5 out of 5 by from have used this product in the past and have always had great results.administered drops as suggested by our vet and ear infection cleared up quickly.
Date published: 2014-08-13
Rated 4 out of 5 by from Very effective My vet gave Mometamax for my Shitzu for an ear infection & said to treat both ears. Worked very fast, but noticed loss of hearing. I have stopped treatment, is this temporary?
Date published: 2014-03-26
Rated 5 out of 5 by from The utmost best product dogs ask for I have tried a lot of products, and this one product out does every item recomended for dogs.When my baby's need help with their ears, they will tell me they want Momentamax . They go the the shelf I keep it on and look at it and look at me.
Date published: 2014-03-13
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Do you ship this product to Canada?

Asked by: Jeff
Yes, we ship to Canada.
Answered by: Ben B
Date published: 2017-02-27

My dog is experiencing hearing loss, how long does that side effect last?

Asked by: kelly
These ear drops are used to treat ear infections. If your dog is experiencing noted ear loss, you should discontinue the product and talk with your Vet about further options. Make sure your Vet thoroughly checks your dogs ears/ear drum. Hope this helps.
Answered by: Trey W
Date published: 2017-02-21

Does the 15g bottle Only have a small Amount in it or should the bottle be full?

Asked by: Tshank86
This would not be full and should last for the prescribed amount of time.
Answered by: Ben B
Date published: 2017-02-21

If by accident I put it in my dogs eyes 

Asked by: Lucy
You should flush your dogs eyes out with water and take your dog to the vet in order to be examined.
Answered by: Ben B
Date published: 2017-02-21

I accidentally poured most of the bottom into my dogs ear ..should i be concern

Asked by: Moose
If you notice your dog acting strangely, contact your veterinarian right away.
Answered by: paulpharmacistintern
Date published: 2016-08-17

Dosage question

My vet prescribed Mometamax 30g drops twice daily for 14 days for an ear infection. Everything I've read says once daily for 7 days...I'm concerned with this dosage...
Asked by: Anonymous
It would be best to ask your veterinarian about the dosing. The type of infection or the type of bacteria may be the reason your vet wants to treat for 14 days.
Answered by: Anonymous
Date published: 2017-01-27

Middle ear infections of dogs?

My Boston Terrier had a yeast infection but 4 antibiotics seemed to clear a middle ear infection. But she seems to be chasing something in her head at night. She'll looks left and right seeming to be intrigued by whatever it is. She appears going off balance as she "chases" this. No fever but what will help? This medicine? I make her quit as I know it can't be good for her to do that.
Asked by: Anonymous
Please consult a veterinarian for a diagnosis.
Answered by: S Duesler PharmD MBA
Date published: 2016-06-11

reocurring ear infection

My dog had a ear infection with a bad smell used mometamax and she was better now the smell is back after a month can I use some more of the mometamax, thanks
Asked by: Anonymous
Yes, of course. Its what your Vet give you in the first place. My little doggie has the same problem. My Vet pulled all the hair out of his ears and told me to keep his hair in his ears cleaned out. It just pulls a little and it really didn't bother him. I've noticed since I do that he isn't getting infections as much.
Answered by: Anonymous
Date published: 2014-08-30
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