PHENOBARBITONE 30mg Tablets (1000) contain Phenobarbital, a barbiturate used to treat seizures, epilepsy, and as a sedative. It works by slowing down the activity of the brain and nervous system. Phenobarbital can also be used for insomnia and anxiety, but should be taken with caution due to its sedative effects. Always follow your healthcare provider’s instructions for proper dosage and use.