Ear mites in dogs are treated most effectively with oral flea and tick medications from the isoxazoline class, which can eliminate over 99% of mites within a month. Prescription topical treatments and over-the-counter ear drops also work, though they require longer treatment courses. The right choice depends on how severe the infestation is and whether your dog has a secondary infection.
Oral Medications: The Most Effective Option
The fastest and most convenient treatments for ear mites are oral chewable tablets originally designed for fleas and ticks. These medications circulate through your dog’s bloodstream, so when mites feed on skin debris and fluids, they ingest the drug and die. Three products have strong clinical evidence behind them for ear mites specifically.
Fluralaner (sold as Bravecto) requires just a single oral dose. In a controlled study, one dose produced a 99.8% reduction in mites by day 28. Afoxolaner (NexGard) is given as two monthly doses and achieved a 99.4% reduction by day 28 in one trial, with all treated dogs completely mite-free by day 42 in another. Sarolaner (Simparica) also uses two monthly doses. In a large field study of 163 dogs, 99.4% were mite-free by day 60.
These medications are prescription-only, so you’ll need a vet visit. That visit is worth it for another reason: your vet can check whether the mites have caused a secondary bacterial or yeast infection, which is common and requires separate treatment.
Over-the-Counter Ear Drops
Most OTC ear mite products contain pyrethrins, a plant-derived insecticide that kills adult mites on contact. Brands like PetArmor and similar products are widely available at pet stores. They work, but with an important limitation: pyrethrins only kill adult mites, not eggs. Since the ear mite life cycle from egg to adult takes about three weeks, you need to keep applying the drops long enough to catch each new generation as it hatches.
Specialists recommend using these products for at least 21 days, and some suggest a full 30-day course to be safe. If you stop too early, surviving eggs hatch into new adults that restart the infestation. This is the most common reason OTC treatments seem to “fail.” Pyrethrins can also cause skin reactions in some animals, so watch for increased redness or irritation after application.
Prescription Topical Treatments
Some prescription ear medications contain ingredients that can kill mite eggs in addition to adults. This shortens the treatment window to 10 to 14 days rather than the 21 to 30 days required by OTC products. These prescription drops also tend to have an oily base that helps loosen and float out the crusty dark debris that mites leave behind, making them useful for both treatment and cleaning.
Why Cleaning the Ears Matters
Ear mites trigger a distinctive dark, waxy, crusty discharge that builds up in the ear canal. If this debris is packed deep into the canal, topical medication can’t reach the mites living underneath it. Cleaning before (or alongside) treatment makes the medication significantly more effective.
To clean your dog’s ears at home, fill the ear canal with a veterinary ear cleaning solution, then gently massage the base of the ear for 15 to 20 seconds. Have a towel ready, because your dog will want to shake their head, which actually helps loosen debris. Then use cotton balls or cotton pads to gently wipe out what you can reach, going only about one knuckle deep. Never use cotton swabs, as they push debris deeper into the canal. If your dog shows signs of pain during cleaning, stop and have your vet handle it.
Treat Every Pet in the House
Ear mites spread through direct physical contact between animals, and dogs and cats pass them to each other readily. If you treat one pet but not the others, untreated animals will simply re-infect the one you treated. Every dog and cat in the household needs to be treated at the same time, even if they aren’t showing symptoms yet. Adult mites live about two months and reproduce continuously, so an untreated pet can harbor the infestation for a long time.
The mites spend their entire life cycle on the host animal, though they can survive briefly in the environment. This means you generally don’t need to do intensive environmental cleaning the way you would for fleas, but washing pet bedding during treatment is a reasonable precaution.
When Mites Cause a Secondary Infection
Ear mites are a primary cause of ear inflammation, but the damage they do to the ear canal often invites bacteria and yeast to take hold. Staphylococcus bacteria and Malassezia yeast are the most common culprits. When this happens, your dog may have a worse smell from the ears, more intense scratching, or discharge that looks different from the typical dark, dry mite debris.
Killing the mites alone won’t resolve a secondary infection. Your vet can examine a swab of the ear discharge under a microscope to identify whether bacteria or yeast are present. This simple test is the single most useful diagnostic step for guiding treatment. If an infection is confirmed, your dog will likely need antibiotic or antifungal ear drops in addition to the mite treatment. Left untreated, secondary infections can persist and worsen even after the mites themselves are gone.