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• Famciclovir

  Famciclovir is given by mouth and is used off-label to control feline herpesvirus. Give as directed. Side effects may include vomiting, diarrhea, decreased appetite, and increased drinking and urination. Do not use it in pets that are allergic to it or penciclovir. If a negative reaction occurs, call your veterinary office.

• Fentanyl

  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.

• Ferrous Sulfate

  Ferrous sulfate is given by mouth and is used off label to treat iron-deficiency. Use as directed by your veterinarian. Common side effects include gastrointestinal upset such as discomfort, constipation, nausea, vomiting, and diarrhea. Do not use in pets that are allergic to it. If a negative reaction occurs, please call your veterinary office.

• Fluocinolone Acetonide & Dimethyl Sulfoxide (DMSO) Otic Solution

  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.

• Fluoroquinolones - Otic

  Fluoroquinolone topical formulations are used to treat bacterial infections. They are used off label to treat external ear infections by topically applying the medication directly to the ear canal. Side effects may include increased redness or inflammation and should be discontinued and call your veterinarian if this occurs.

• Fluralaner

  Fluralaner is given by mouth or applied topically and is used to treat flea and tick infestations, and also off-label to treat certain types of mange and mites. Give as directed. Side effects are uncommon but may include stomach upset or neurologic symptoms. Do not use in pets with a history of seizures. If a negative reaction occurs, please call the veterinary office.

• Fluticasone Propionate

  Fluticasone propionate (Flovent) is commonly used off label to treat asthma and other chronic tracheobronchial diseases. It is administered as an inhaled medication via an aerosol canister and a delivery device. Side effects are uncommon but include upper airway irritation or infection. This medication should not be used during an acute bronchospasm.

• Folic Acid

  Folic acid is given by mouth or injection and is used to treat folic acid deficiencies due to intestinal or pancreatic disease, or due to the use of certain medications. Give as directed by your veterinarian. Side effects are not common but may include stomach upset. Do not use in pets with a known sensitivity. If a negative reaction occurs, please call your veterinary office.

• Frunevetmab

  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.

• Gentamicin + Betamethasone Ophthalmic

  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.