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

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Size: 15-g
  • 15-g Temporarily out of stock
  • 30-g In stock
  • 215-g In stock

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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.


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.

  1. Prescribing Information

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  • Item Number
  • Brand


  • Common Brand Name(s)


  • Dosage Measure

    7 days

  • For Use With


  • Generic Name

    Gentamicin Sulfate, Betamethasone Valerate, Clotrimazole

  • Brand


  • 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.

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  • Pharmacy Order

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    I am grateful I was able to buy Otomax at Chewey for my dog's (yeast) ear infection, and the staff was helpful in keeping me up-to-date on the status of my order. I wish, however, that it was possible to scan or fax prescriptions to the Chewey Pharmacy as it took eleven days between the time the vet wrote the prescription and the product's delivery. (My vet claims this is a product he can no longer acquire, and as it is more effective than Tresaderm, the infection was still active when the Otomax arrived.)

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  • Ottomax is fabulous

    By on

    Great product. Works so well for sensitive pups Happy with the customer service. So easy.

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