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Medications & Supplements

  • Fentanyl is an opioid medication used off-label to treat pain in cats and dogs. It is often given as an injection in hospital, but patches may be prescribed to deliver fentanyl transdermally (through the skin) for pets at home. This handout describes common side effects, risk factors, and drug interactions. If a negative reaction occurs, please call your veterinary office.

  • Florfenicol/terbinafine/betamethasone otic (brand name Osurnia®) is a long-acting, topical ear medication used to treat the itching and inflammation associated with certain bacterial ear infections in dogs. It is labeled for use in dogs and not intended for use in cats. Florfenicol/terbinafine/betamethasone otic should only be administered by a veterinary professional.

  • Florfenicol/ terbinafine/mometasone otic (brand names: Claro®, Simplera®) is a long-acting, topical ear medication used to treat the itching and inflammation associated with certain bacterial and/or ear infections in dogs. It is not intended for use in cats. This medication is usually given by veterinary personnel as a single dose.

  • Fluocinolone + acetonide DMSO (brand name Synotic®) is applied topically and is labeled to treat ear inflammation in dogs. It is also used off-label to treat ear infections in cats. Give as directed. Side effects are rare but may include temporary hearing loss or skin reactions. Do not use on pets allergic to corticosteroids or DMSO, on pets with a ruptured ear drum or pets that are pregnant.

  • Fosfomycin is an antimicrobial used to treat multi-drug-resistant bacterial urinary tract infections (UTIs) in dogs. It is used off label (extra label) in veterinary medicine. Fosfomycin comes in granule and compounded liquid suspension forms. Do not use in cats as fosfomycin is nephrotoxic (toxic to the kidneys) in this species.

  • Frunevetmab is a formulation of feline anti-nerve growth factor antibodies used to control osteoarthritis pain in cats. This medication is given by an injection under the skin, usually at the veterinary clinic. Side effects may include vomiting, diarrhea, appetite loss, itching, scabbing and hair loss on the head and neck, and pain at the injection site. Call your veterinary office immediately if you suspect an overdose or an adverse reaction to the medication.

  • Fuzapladib sodium (brand name Panoquell®-CA1) is an intravenous injection used by veterinarians to manage the clinical signs of acute pancreatitis in dogs. Potential side effects include reduced appetite, vomiting, diarrhea and jaundice. Call your veterinary office immediately if you suspect an adverse reaction to the medication.

  • Gentamicin + betamethasone ophthalmic is a steroid anti-inflammatory eye medication with antibiotic used for the treatment of external eye infections and inflammation of the eye in dogs. It is also sometimes used to manage pannus or pigmentary keratitis in dogs. It may be used off-label in cats and horses.

  • GMHa (brand name: Easotic) is a combination antibiotic, antifungal, and corticosteroid anti-inflammatory drug used to treat certain bacterial and yeast ear infections. GMHa is a suspension used once daily to treat ear infections. This article discusses dosage, potential side effects, risks, and monitoring.

  • Gentamicin topical is an antimicrobial medication used to treat bacterial infections of the skin. It is approved for use as a spray in dogs to treat surface bacterial infections of the skin. It can be found in combination medications to treat other types of surface infections in dogs, including ear infections. It is used “off label” or “extra label” in other animals.