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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.
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.
Acetic acid/boric acid otic may cause the following side effects:
The following reactions are extremely rare; if they occur, contact your veterinarian immediately:
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.
This medication should be AVOIDED in animals:
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.
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.
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.
© Copyright 2025 LifeLearn Inc. Used and/or modified with permission under license. This content written by LifeLearn Animal Health (LifeLearn Inc.) is licensed to this practice for the personal use of our clients. Any copying, printing or further distribution is prohibited without the express written consent of LifeLearn. This content does not contain all available information for any referenced medications and has not been reviewed by the FDA Center for Veterinary Medicine, or Health Canada Veterinary Drugs Directorate. This content may help answer commonly asked questions, but is not a substitute for medical advice, or a proper consultation and/or clinical examination of your pet by a veterinarian. Please contact your veterinarian if you have any questions or concerns about your pet’s health. Created on Jun 19, 2024.
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2801 Keele St. Unit #101 Downsview, ON M3M 2G6
Phone: 416- 633-2255
Fax: 416-633-2305
E-Mail: downsviewveterinary@bellnet.ca
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