Educational Articles
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Fenbendazole (brand names Panacur®, Safe-Guard®) is a medication used to treat a variety of parasites in dogs. Its use in cats for the treatment of parasites is off label or extra label. Fenbendazole comes as oral granules or as a liquid suspension and is given by mouth. At regular doses, fenbendazole does not usually cause any side effects. Fenbendazole should not be used in puppies younger than six weeks of age or in sick animals.
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Fenofibrate is a fibric acid derivative used as an anti-lipemic agent to lower triglycerides (a type of fat or lipid) in dogs. Its use in cats and other animals has not been studied. It is used off label (extra label) in veterinary medicine. Fenofibrate comes in capsule and tablet forms.
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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.
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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.
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Finasteride is given by mouth and is used off-label to treat benign prostatic hypertrophy (enlarged prostate) in intact male dogs, and may also be used for adrenal problems in ferrets. Give as directed. Side effects are uncommon. Do not use it in sexually developing animals or in females, including pregnant or nursing females. If a negative reaction occurs, please call your veterinarian.
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Fipronil is used topically to treat flea, tick, and chewing lice infestations. Side effects are uncommon but may include skin irritation at the application site. Do not use this product on pets less than 8 weeks old, geriatric pets, or sick/weak pets.
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Fipronil with cyphenothrin and s-methoprene, topical (brand name Frontline® Tritak for dogs), is a medication used to treat and control fleas, ticks, and chewing lice in dogs and puppies 12 weeks of age and older and weighing more than 1.8 kg (4 lb). It may also be used as a treatment of sarcoptic mange. Avoid use in rabbits, other small mammals, and cats.
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Fipronil with cyphenothrin, topical (brand name Parastar® Plus for dogs), is a medication used to treat and control fleas, ticks, and chewing lice in dogs and puppies 12 weeks of age and older and weighing more than 1.8 kg (4 lb). It may also be used to treat sarcoptic mange. Avoid use in rabbits, other small mammals, and cats.
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Fipronil with dinotefuran and pyriproxyfen, topical (brand name Catego® for cats), is a medication used to treat and control fleas, ticks, and chewing lice in cats and kittens 8 weeks of age and older and weighing at least 0.7 kg (1.5 lb). Fipronil with dinotefuran and pyriproxyfen comes in topical, spot-on forms.
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Fipronil with etofenprox and s-methoprene, topical (brand name Frontline® Tritak for cats), is a medication used to treat and control fleas, ticks, and chewing lice in cats and kittens 12 weeks of age and older. Avoid use in rabbits and other small mammals.
