title: Letter: Levodopa-propranolol therapy in parkinsonian tremor.
mesh_terms: D001812:Blood-Brain Barrier / Q000187:drug effects; D004295:Dihydroxyphenylalanine / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use*; D004357:Drug Synergism; D004359:Drug Therapy, Combination; D006801:Humans; D018377:Neurotransmitter Agents; D010300:Parkinson Disease / Q000150:complications / Q000188:drug therapy*; D011433:Propranolol / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use*; D014202:Tremor / Q000188:drug therapy* / Q000209:etiology
chemical_list: D018377:Neurotransmitter Agents; D004295:Dihydroxyphenylalanine; D011433:Propranolol