Parkinson's disease. Modification by 5-hydroxytryptophan.

5-Hydroxytryptophan/therapeutic use Adult Aged Brain/metabolism Carboxy-Lyases/antagonists & inhibitors Clinical Trials as Topic Drug Synergism Evaluation Studies as Topic Extrapyramidal Tracts/drug effects Female Humans Hydrazines/therapeutic use Hydroxyindoleacetic Acid/cerebrospinal fluid Male Methyldopa/therapeutic use Middle Aged Parkinson Disease/cerebrospinal fluid,drug therapy,metabolism Phenylacetates/cerebrospinal fluid Placebos Serotonin/metabolism

Hydrazines Phenylacetates Placebos Serotonin Hydroxyindoleacetic Acid Methyldopa 5-Hydroxytryptophan Carboxy-Lyases