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  • Flaxseed oil (also called flax oil) is derived from flax plant seeds and contains high levels of alpha-linolenic acid (ALA), an omega-3 fatty acid that has anti-inflammatory effects in the body. Flaxseed oil is used as a dietary supplement to treat inflammatory conditions in cats, dogs, and other animals.

  • Flea allergy dermatitis is a common cause of allergic reactions in dogs. The antigens in flea saliva cause an intensely itchy response in sensitive dogs. Itching and hair loss in the region from the middle of the back to the tail base and down the rear legs (the flea triangle) is often associated with this allergy. Strict flea control is essential for treatment and prevention.

  • Fleas and ticks are small, parasitic insects that can be found worldwide. Their bites can cause skin irritation and sometimes severe allergic reactions in pets and people. They can also carry diseases that can be deadly or can cause severe, chronic, and lifelong illness. Prevention is key to avoiding infestations and preventing disease.

  • Fleas are the most common nuisance and parasite affecting dogs, and an infestation can lead to serious health problems. Homes with carpets and central heating provide ideal conditions for the year-round growth of fleas. This handout outlines flea control options for your dog and your home.

  • 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 and yeast ear infections in dogs. It should only be administered by a veterinary professional.

  • Florfenicol + terbinafine + mometasone otic (brand names: Claro, Simplera) is a topical ear medication used to treat the itching and inflammation associated with certain bacterial and yeast ear infections in dogs. This medication is usually given by veterinary personnel as a single dose.

  • Flow cytometry is a laboratory technique that can be used for counting, examining, and sorting cells. A sample is passed through a light source and as the cells move through the path of the light source, they scatter the light in different ways.

  • Flower essences are extracts from various types of flowers that are used to balance emotions. In animals, they are used to relieve emotional stress and anxiety. Flower essences are used in many different animals, including cats, dogs, horses, fish, birds, and other animals.

  • 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.

  • Flucytosine is an antifungal drug used in combination with other drugs to treat serious fungal infections in pets. No veterinary products are available. Human products (Ancobon®) are used off label in dogs, cats and birds; caution is advised for use in dogs, as they may develop severe skin reactions.