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  • Lactulose is used off label and is given by mouth to treat high blood ammonia levels and constipation in dogs, cats, birds, and reptiles. The most common side effects are diarrhea, bloating, gas, and abdominal cramping. Do not use in pets that are allergic to it or in pets with intestinal blockage/obstruction.

  • Gabapentin (brand names: Neurontin®, Aclonium®, Equipax®, Gantin®, Gabarone®, Gralise®, Neurostil®, Progresse®) is an anti-seizure and pain medication that is used with other medications to treat seizures and chronic pain, primarily nerve pain, in dogs and cats. It has also been used in cats to treat fear and anxiety associated with veterinary visits. It is given by mouth in the form of a capsule, tablet, or compounded liquid.

  • Hydralazine is given by mouth and is used off label to treat high blood pressure and some causes of heart failure in cats and dogs. Side effects include decreased appetite, vomiting, and/or diarrhea. Do not use in pets that are allergic to it or in pets with heart vessel disease, low blood pressure, severe dehydration, or severe blood loss.

  • Imidacloprid oral is given by mouth to treat flea infestations in dogs only. Side effects are uncommon but may include vomiting, soft stools, decreased appetite, or difficulty walking. Do not use this medication in cats, in puppies less than 10 weeks old or weighing less than 4 pounds, or in pregnant or lactating dogs.

  • Imidacloprid topical is used on and off label and is applied topically to the skin to treat flea infestations in cats, dogs, and ferrets. It is frequently used in combination with other medications to treat a variety of parasites. Side effects are uncommon but may include irritation at the application site or drooling, shaking, vomiting, and decreased appetite if the medication is accidentally ingested. Do not use combination products in young pets. Certain combination products should not be used in cats.

  • Naloxone (brand name Narcan®) is a drug used to reverse the effects of opioids. It is used primarily under direct supervision of a veterinarian. It is used off-label in veterinary medicine. Naloxone comes in nasal spray and injectable forms.

  • Vitamin B complex injectable is a solution containing multiple forms of Vitamin B, which are used together to prevent or treat Vitamin B deficiencies. These vitamins promote good overall health for your pet and regulate certain processes in the body. Vitamin B complex injectable comes as a solution for injection either under the skin or into the muscle.

  • Sulfamethoxazole/trimethoprim is given by mouth in the form of a liquid suspension or is given by injection in the hospital, and it is commonly used to treat bacterial and parasitic infections, sometimes off label, in dogs, cats, small mammals, and other exotics. Common side effects include a decreased appetite, vomiting, and diarrhea, although more serious side effects are possible such as dry eye, or liver, blood, or urinary problems. Do not use in pets that have severe liver damage, blood cell problems, dehydration, or sulfa allergies. If a negative reaction occurs, please call your veterinary office.

  • Immunotherapy (oral and injectable) is a treatment that involves using a pet’s own immune system to fight health conditions, such as certain allergies or certain types of cancer. Immunotherapy is specially formulated for each individual. It comes in injectable and oral forms.

  • Fosfomycin is an antimicrobial used to treat multi-drug-resistant bacterial urinary tract infections (UTIs) in dogs. It is used off label (extra label) in veterinary medicine. Fosfomycin comes in granule and compounded liquid suspension forms. Do not use in cats as fosfomycin is nephrotoxic (toxic to the kidneys) in this species.