Tresaderm Topical Solution for Dogs & Cats

Prescription Item

  • Price:


In stock
Size: 7.5-mL
  • 7.5-mL In stock
  • 15-mL In stock

This item requires prescription approval. Details

Medications ship separately. Delivery times may vary. Details

This item is specially packaged to remain refrigerated during transit.

We'll collect your pet's prescription information at Checkout.

cw-icon-heart Created with Sketch. Add to Favorites

Tresaderm is a combination ear and skin medication prescribed to dogs and cats. This medication contains an antifungal, corticosteroid and a broad-spectrum antibiotic to treat inflammation, as well as bacterial and fungal infections of the ear and skin. This topical solution comes in convenient drop form, making treatment easier for you and your pet.


Tresaderm is applied directly on the skin or in the ears in order to kill susceptible bacteria, fungus, and yeast. It also helps relieve local inflammation associated with the infection.

Possible Side Effects

Skin irritation and redness at the affected area is possible. If Tresaderm is used on an open wound, it can cause minimal pain for up to 15 minutes. If ingested or used chronically, side effects from the dexamethasone may be noted including increased drinking/urination, vomiting, immune suppression, and weight gain. These side effects can resolve when the dosage is decreased.

Some pets may have an allergic reaction to the ingredients in Tresaderm although this is not common.

Drug & Food Interactions

Interactions are possible with non-steroidal anti-inflammatory drugs (NSAIDs), other corticosteroids, or gentamicin. Other interactions may occur. Discuss all medications/supplements your pet is taking with your veterinarian prior to giving Tresaderm to make sure it can be given safely.


Pets with an allergy to any of ingredients shouldn't use Tresaderm. In dogs birth defects have been reported with the use of corticosteroids. This medication shouldn't be ingested; it's for topical use only. Avoid contact with eyes.

  1. Prescribing Information

See all items by Tresaderm

  • Item Number
  • Brand


  • Common Brand Name(s)


  • Dosage Measure

    Use according to your veterinarian's instructions.

  • For Use With

    Dogs & Cats

  • Generic Name

    Dexamethasone, Neomycin Sulfate, Thiabendazole Solution

  • Brand

    Merial, Boehringer Ingelheim

  • Product Form


  • Health Condition

    Ear Infections, Skin Infections, Fungal Infections

  • Drug Type

    Antibiotic, Antifungal, Anti-inflammatory


Active Ingredients per mL: Thiabendazole (40 mg), Dexamethasone (1 mg), Neomycin (3.2 mg) (from neomycin sulfate).

Inactive Ingredients: Glycerin, Propylene Glycol, Purified Water, Hypophosphorous Acid, Calcium Hypophosphite; about 8.5% Ethyl Alcohol and about 0.5% Benzyl Alcohol.

Recommended Dosage

Always follow the instructions and guidance provided by your veterinarian. Trim any excess fur, clean and dry the affected area before you apply Tresaderm. If you miss a dose, you can give it as soon as you remember, but never double dose. Always ask your veterinarian if you have questions about how to best use this medication.

Storage Instructions

Store in refrigerator at temperatures between 36° - 46°F.


What are the benefits?

  • Available in a convenient drop form.
  • Broad-spectrum action that can help resolve bacterial and fungal infections plus relieve inflammation.
  • Can be used topically on the skin and in the ears.

What outcomes can be expected?

Tresaderm will kill susceptible organisms that cause infection when used as prescribed. You should notice your pet feeling better and his skin and ears should start to return to normal. Use beyond 7 days could delay wound healing. If your pets skin/ears are not improving after the medication is finished, contact your veterinarian.

How is it given?

  • Always follow your veterinarians prescribed instructions carefully while using this medication.
  • Clean and dry the affected area and trim any excess hair before starting topical treatment with Tresaderm.
  • Apply the prescribed amount of drops and gently massage into the affected area.
  • If you have any questions about how to use Tresaderm, contact your veterinarian. Incorrect use can result in recurring infection or damage to the ear(s).

How does it work?

Thiabendazole is an antifungal agent, dexamethasone is a corticosteroid and neomycin is a broad-spectrum antibiotic. These ingredients help to kill susceptible bacteria and fungi/yeast plus relieve associated inflammation.

Customer Reviews
2 Reviews 2 Reviews 4.5 out of 5 Stars

100% Recommend

100% of reviewersrecommend this product

4.5 / 5

You've Already Reviewed This Item

Showing 2 Reviews

Sort by:
Filter by:
  • Great formula. RX item.

    By on

    This always gets prescribed in the fall when my cats get chiggers and gets rid of them effectively. Great price at chewy and they get the rx verified with my vet seamlessly.

    You liked it! Something went wrong. Please try again later. Report
  • Great ear drops for my pets

    By on

    I have been using these on my dog and cats for a long time and they work great. The cost from Chewy is less than half from my. Vet.1

    You liked it! Something went wrong. Please try again later. Report