Pet Health Library
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Flaxseed oil is derived from flax plant seeds and contains high levels of alpha-linolenic acid (ALA), an omega-3 fatty acid, and is used to treat certain inflammatory conditions. Give as directed by your veterinarian. Side effects may include diarrhea, vomiting, delayed wound healing, or an oily coat and skin flakes. Serious side effects include persistent stomach upset, or pancreatitis. Flaxseed oil should not be used in pets that are allergic to it. If a negative reaction occurs, please call your veterinary office.
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Fleas are the most common nuisance and parasite affecting cats, and an infestation can lead to serious health problems. Flea control requires a three-pronged approach; they need to be eliminated from 1) your cat, 2) any other cats and dogs that you have, 3) your home and yard. There are many flea control products available and your veterinarian can help you determine which are safest and most effective for your pets.
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Flower essences are an over the counter supplement given by mouth or applied topically to treat stress or anxiety. Give as directed by your veterinarian. There are no known side effects. Do not use in pets that are allergic to it or that are pregnant or nursing. Flower essences should be used cautiously in debilitated pets or pets in organ failure. If a negative reaction occurs, please call your veterinary office.
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Fluconazole is an antifungal medication used off label in cats, dogs, and small mammals to treat fungal infections, especially those in the brain and spinal cord. It is given by mouth in the form of a tablet or liquid suspension and is also available as an injection for hospital use. It should be used with caution in pets with liver or kidney disease, or pregnant or lactating pets.
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Fludrocortisone acetate is given by mouth and is used off label to treat hypoadrenocorticism (Addison’s disease) and hyperkalemia. Give as directed by your veterinarian. Side effects are uncommon but may include vomiting. Do not use in pets that are allergic to it or in lactating pets without using a milk replacer. If a negative reaction occurs, please call your veterinary office.
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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.
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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.
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Fluoxetine is given by mouth and is used on and off label to treat various behavioral conditions. Common side effects include sleepiness and decreased appetite. Do not use in pets with a history of seizures, that are on medications that lower the seizure threshold, that are allergic to it, taking MAOIs, younger than 6 months old, or aggressive pets. If a negative reaction occurs, please call your veterinary office.
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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.
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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.