Library
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Psyllium fiber capsules (brand name Vetasyl®) are fiber supplements used in cats and dogs to help promote bowel health. Vetasyl contains psyllium seed husks and barley malt extract powder contained in gelatin capsules.
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Pyrantel pamoate is given by mouth and is used on and off label to treat intestinal parasites in many species. Give as directed. Side effects are uncommon but may include stomach upset, such as vomiting or diarrhea. Do not use in pets that are allergic to it. If a negative reaction occurs, call your veterinarian.
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Pyrethrins + piperonyl butoxide + bicycloheptene dicarboximide otic (brand name Otomite Plus®) is a medication used to treat ear mites in dogs and cats older than 12 weeks of age. Pyrethrins + piperonyl butoxide + bicycloheptene dicarboximide otic comes in a liquid drop form. It is highly toxic to aquatic species and toxic to cats if ingested.
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Pyridostigmine bromide is given by mouth or injection and is used off label to treat symptoms related to myasthenia gravis. Give as directed. Dose-related side effects include drooling, diarrhea, increased urination, abdominal pain, muscle cramps, and increased tear production. Do not use in pets that are allergic to it or other bromides, or in pets that have urinary or gastrointestinal tract obstructions or blockages. If a negative reaction occurs, please call your veterinary office.
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Pyrimethamine is an antiprotozoal tablet given by mouth and used off-label to treat certain parasitic infections. Common side effects include vomiting, low appetite, tiredness, and low blood cell counts. Cats are more likely to have more severe side effects. Pregnant women should handle this medication carefully.
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Ranitidine is given by mouth or injection and is used off-label to treat ulcers and erosions in the stomach and upper small intestine, reflux, or gastrointestinal motility issues. Give as directed. Side effects are uncommon but may include stomach upset. Do not use in pets with a history of allergies to this class of drugs. If a negative reaction occurs, call your veterinarian.
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Remdesivir is an injectable, antiviral medication used to treat feline infectious peritonitis (FIP) in cats. The injection may be painful or cause swelling or inflammation. Its use is still being evaluated and any concerns should be reported to your veterinarian immediately.
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Rifampin is commonly used off label to treat infections in horses, and occasionally in dogs and cats. It is usually given by mouth in the form of a capsule or compounded liquid. The most common side effects are vomiting, diarrhea, or reduced appetite. Liver dysfunction is possible. A change in the color of urine, tears, and saliva to a red/orange color is expected but may stain fabrics. Use with caution in pets that have pre-existing liver disease, are pregnant, are elderly, or are lactating. If a negative reaction occurs, call your veterinary office.
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Rivaroxaban is an anticoagulant used to prevent or treat blood clots in cats and dogs. It is used off label (extra label) in veterinary medicine. Rivaroxaban comes in tablet form. Monitor for unusual bleeding, bruising, pale gums, extreme weakness, collapse, and/or difficulty breathing.
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Robenacoxib (brand name: Onsior) is given by mouth in the form of a tablet to treat pain and inflammation associated with surgery or other musculoskeletal conditions in dogs and cats. Do not use this medication in pets that are allergic to it, or in pets concurrently using corticosteroids or other NSAIDs. If a negative reaction occurs, call your veterinary office.