Acetic Acid/Boric Acid: Otic

What is acetic acid/boric acid otic?

Acetic acid/boric acid otic (brand name Malacetic Otic®) is an antibacterial and antifungal medication used as an ear cleaner and drying agent in dogs and cats with ear infections.

This cleanser may be part of a combination product that includes other medications, such as ketoconazole, chlorhexidine, and/or a steroid. This medication is available over the counter (OTC) but should only be used under the direction of a veterinarian.

It may be used “off label” or “extra label” in other species. Many drugs are commonly prescribed for off-label use in veterinary medicine. In these instances, follow your veterinarian’s directions and cautions very carefully.

How do I give my pet acetic acid/boric acid otic?

• This cleanser is meant for use in the ear canal.
• Shake well prior to applying into the ear.
• Ensure you follow your veterinarian’s directions regarding the frequency of doses and the appropriate sequence of ear medications in relation to this cleanser.
• Avoid contact with eyes.
• Wash hands after use.

What if I miss giving my pet the medication?

Give the missed dose as soon as you remember and then continue with the regular dosing schedule. If it is almost time for the next dose, skip the missed dose and continue with the regular schedule. Do not give the pet two doses at once.

Are there any potential side effects from acetic acid/boric acid otic?

Acetic acid/boric acid otic may cause the following side effects:

• Worsening irritation or reddening of the ear or surrounding skin 

The following reactions are extremely rare; if they occur, contact your veterinarian immediately:

• an allergic reaction such as irregular breathing, rash, fever, puffiness and swelling around the face

Sensitivities can develop over time with repeated exposure. Your pet may have no reaction after the first few doses but may develop a sensitivity later. It is important to watch for signs of an allergic reaction over the entire course of treatment.

Other side effects may occur. If you notice anything unusual, contact your veterinarian immediately. 

Are there any risk factors for this medication?

This medication should be AVOIDED in animals:

• who are allergic to any component
• who are immature, pregnant, or nursing
• who have severely irritated skin/ears

Are there any drug interactions I should be aware of?

No known drug interactions have been reported for this cleanser; however, using this cleanser soon before or after ear medication may reduce its effectiveness. Your veterinarian will recommend how close together these treatments can be given.

Be sure to tell your veterinarian about any medications (including vitamins, supplements, or herbal therapies) that your pet is taking before starting any new treatment.

Is any monitoring needed with this medication?

Your veterinarian may schedule a follow-up visit for after the course of medication is complete to ensure the infection has been cleared and/or do additional tests to ensure this is the right medication for the infection present. In this case, follow your veterinarian’s directions.

How do I store acetic acid/boric acid otic?

• Store the medication in its original container at room temperature with a tightly closed cap. 
• Protect from light and moisture. 
• Do not freeze.
• Keep medication out of reach of children and pets.

What should I do in case of emergency?

If you suspect an overdose or an adverse reaction to the medication, call your veterinary office immediately. If they are not available, follow their directions in contacting an emergency facility.