Otomax (Gentamicin / Betamethasone / Clotrimazole) Otic Ointment for Dogs, slide 1 of 1

Otomax (Gentamicin / Betamethasone / Clotrimazole) Otic Ointment for Dogs

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Size: 15-g tube
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Otomax is an ointment prescribed by your vet to treat your canine companions' acute or chronic ear infection. It's a combination of a steroid, antibacterial and antifungal ear medication, and it may be effective against both bacterial and yeast infections of the ear as well as inflammation. This tube comes with a convenient applicator for easy administration.

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Otomax ointment is indicated for the treatment of acute and chronic ear infections.

Possible Side Effects

Please contact your veterinarian if the following adverse reactions occur: hearing loss or balance problems, increased drinking and urination, topical or systemic allergic reaction or bacterial and fungal infections.

Drug & Food Interactions

If hypersensitivity to any of the components occurs, treatment should be discontinued and appropriate therapy instituted. Associated use of drugs known to induce ear toxicity should be avoided. Do not use in pets with known perforation of eardrums.


If overgrowth of non-susceptible bacteria, fungi, or yeasts occur, or if hypersensitivity develops, treatment should be discontinued, and appropriate therapy instituted. Administration of recommended doses beyond seven days may result in delayed wound healing. Avoid ingestion. Before instilling any medication into the ear, examine the external ear canal thoroughly to be certain the ear is not ruptured in order to avoid the possibility of transmitting an infection to the middle ear, as well as damaging the ear from prolonged contact.

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  1. Prescribing Information

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  • Item Number
  • Common Brand Name(s)
    Otomax, Tri-Otic
  • For Use With
  • Generic Name
    Gentamicin Sulfate, Betamethasone Valerate, Clotrimazole
  • Administration Form
  • Lifestage
  • Product Form
  • Health Condition
    Ear Infections
  • Drug Type
    Antibiotic, Antifungal, Anti-inflammatory

Gentamicin Sulfate, USP Equivalent To 3 Mg Gentamicin Base; Betamethasone Valerate, USP Equivalent To 1 Mg Betamethasone; And 10 mg Clotrimazole, USP.

Recommended Dosage

The external ear should be properly cleaned and dried before treatment. Remove foreign material, debris, crusted exudates, etc., with suitable nonirritating solutions. Excessive hair should be clipped from the treatment area. After verifying that the eardrum is intact, instill 4 drops of OTOMAX ointment twice daily into the ear canal of dogs weighing less than 30 lbs. Instill 8 drops twice daily into the ear canal of dogs weighing 30 lbs or more. Massage external ear canal carefully after installation to ensure appropriate distribution of medication. Therapy should continue for 7 consecutive days.

Storage Instructions

Store between 36° - 77°F. Shake well before use when using the 215g, 30g and 15g bottle.


What is Otomax?

Otomax is an ointment that is applied directly in the ear(s) in order to treat ear infections.

What are the benefits of Otomax?

  • Applicator allows for easy application.
  • Combination of antibiotic, antifungal, and steroid help to treat yeast and bacterial ear infections and inflammation.
  • Can be useful in treating acute and chronic ear infections.

How is this medication given?

Always follow your veterinarians exact instructions. Clean and dry the affected ear(s) and trim any excess hair from the treatment area. Apply the prescribed amount of ointment to the affected ear(s) and massage the ear(s) to distribute medication. If you are unsure of how to use Otomax, always consult with your veterinarian.

How does this medication work?

Otomax contains gentamicin (an antibiotic) and betamethasone (a corticosteroid) which helps to treat susceptible bacteria in the ear(s) and associated inflammation. This medication also contains clotrimazole that helps to treat fungal (yeast) infections of the ear.

What results can I expect?

Otomax relieves the symptoms of your pets ear infection and kills susceptible bacteria that cause them. Using beyond 7 days could delay wound healing. Contact your veterinarian if your pets symptoms are still present after the course of medication has been completed.

Rating: 4.5 of 5 stars 26 Reviews 26 Reviews 4.6 out of 5 Stars

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88% Recommend

88% of reviewersrecommend this product

Rating: 4.5 of 5 stars 4.6 / 5

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26 Reviews

Showing 1-10 of 26 Reviews

  • 5 out of 5 stars

    Ottomax Ointment

    By PugMom on Oct 14, 2021

    This product is great for dog's ear infections. My pug's right ear was red, sore, warm and infected. After using Otomax as prescribed for several days and cleaning the ear twice daily, the infection cleared up.

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  • 5 out of 5 stars

    Otomax is great

    By Pony on Oct 7, 2021

    This medication was prescribed by my vet for a recurring problem with yeast growth. Chewy has the product for a lower cost, and gets it to my house with no problems.

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  • 5 out of 5 stars

    Great Stuff

    By Esquire on Mar 19, 2021

    This stuff is the best. It clears up dog rashes immediately. I mean in 2 days the rash is nearly gone. I love the stuff because my dogs stop scratching and the healing begins it seems immediately.

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  • 5 out of 5 stars

    Best ear medicine

    By Leah on Feb 22, 2021

    The best ear infection medication! It starts working right away and not expensive like Claro which needed 3 or more treatments to work will not use another medication for ear infections with my dog it works every time!

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  • 5 out of 5 stars

    Good Job for Buddy!

    By buddy on Jan 22, 2021

    Just receive ear medicine. Have not used it yet. Process to set and receive from Vet was easy. I even made a mistake in Buddy's weight 135 instead of 35. Received call to correct mistake. Great Follow-up. Thank You. Dennis

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  • 5 out of 5 stars

    Best allergy med for ears

    By Slowdow on Apr 8, 2021

    My dog does great using this product as maintenance for her allergies.

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  • 5 out of 5 stars

    Great product

    By sdpp on Feb 19, 2021

    Works like a charm with my Shar Pei's ear infection.

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  • 1 out of 5 stars


    By Brenda on Oct 1, 2020

    Will NEVER ever buy a thing from this company. They lied and did not contact my vet for our dogs medicine. As a result, we didn't get it until two weeks after ordering and after several emails and phone calls.

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  • 2 out of 5 stars

    Prescription service Horrible

    By Bummed on Aug 5, 2020

    The process of getting a prescription was horrible and once the prescription was issued it took an additional week to get the product. I would never do this again with a new prescription my dog needed the medicine and I could not get it I made two calls with no results and finally the product arrived way too complex a system for Pharmacy. Why they couldn’t pick up the phone and wait for a fax is beyond me medicine is too important to order this way I’ll never do it again

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  • 1 out of 5 stars

    Disappointed in shipping

    By Jeff on Aug 14, 2020

    I've been using Chewy for a couple of years and have been very satisfied. This was the first prescription I ordered from Chewy. The product is fine, however, the shipping took WAY to long (approx 9 days) my dog suffered as he waited. Very disappointed and most likely will not order prescriptions from Chewy anymore.

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