Feline seizure disorders are quite uncommon. Typical causes for seizures are primary or secondary epilepsy. Phenobarbital introduced circa 1900 for humans, remains the main anticonvulsant in cats. Diazepam (Valium) may be an alternative, specifically for cats that do not tolerate phenobarbital well. Finally, bromides, the earliest anticonvulsant for humans, are steadily gaining popularity for treating feline seizures as well.