Fluoxetine can cause numerous side effects in animals. This medicine should not be administered in animals with known hypersensitivity or allergy to the drug. Fluoxetine must not be prescribed for animals with a history of seizures. Before administering the medicine to your pet, consult a veterinarian and determine if Fluoxetine has the possibility to interact with other medications. The drugs which normally interact with Fluoxetine include monoamine oxidase inhibitors (selegiline), diazepam, phenylbutazone, digoxin or buspirone.