title: Tryptophan malabsorption in levodopa-treated parkinsonian patients. Effect of tryptophan on mental disturbances.
mesh_terms: D000368:Aged; D001921:Brain / Q000378:metabolism; D003704:Dementia / Q000097:blood; D003864:Depression, Chemical; D004295:Dihydroxyphenylalanine / Q000009:adverse effects* / Q000494:pharmacology / Q000627:therapeutic use; D005260:Female; D006801:Humans; D006897:Hydroxyindoleacetic Acid / Q000096:biosynthesis / Q000652:urine; D007408:Intestinal Absorption / Q000187:drug effects*; D008297:Male; D001523:Mental Disorders / Q000097:blood / Q000209:etiology* / Q000378:metabolism; D008875:Middle Aged; D010300:Parkinson Disease / Q000097:blood / Q000188:drug therapy* / Q000378:metabolism; D012701:Serotonin / Q000097:blood; D014364:Tryptophan / Q000097:blood* / Q000378:metabolism / Q000652:urine
chemical_list: D012701:Serotonin; D006897:Hydroxyindoleacetic Acid; D004295:Dihydroxyphenylalanine; D014364:Tryptophan