Phenobarbital tablets are mainly used to treat anxiety, insomnia, epilepsy and movement disorders, to treat convulsions caused by high fever or tetanus, eclampsia, meningitis, and can also be used to treat neonatal hyperbilirubinosis and pre-anesthetic medication. 1. Phenobarbital has a general inhibitory effect on the central nervous system, small doses can play a sedative effect, hypnosis, anti-anxiety. 2.Phenobarbital has strong antiepileptic effect, mainly used in the treatment of grand mal seizure, epileptic confined seizure and epileptic status quo. 3. Phenobarbital tablets have strong anticonvulsant effect, used for pediatric convulsions caused by high fever, tetanus, eclampsia, meningitis. 4. It can also be used to treat neonatal hyperbilirubinemia and administered before anesthesia. This drug should be taken strictly under the guidance of a physician and a doctor, and should be discontinued in case of dizziness, rash, or uncoordinated movement, and is contraindicated in persons with severe hepatic or renal impairment, and respiratory depression due to pulmonary insufficiency.