Acefylline piperazine - bronchial asthma. chronic bronchitis. emphysema. phenobarbital - pharmacology: depresses sensory cortex, decreases motor activity, alters cerebellar function and produces drowsiness, sedation, and hypnosis. indication: short-term treatment of insomnia- long-term treatment of generalized tonic-clonic and cortical focal seizures- emergency control of acute convulsions- preanesthetic sedation.