title: Serum dihydrobiopterin levels in patients on tricyclic antidepressants.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000929:Antidepressive Agents, Tricyclic / Q000627:therapeutic use*; D001708:Biopterins / Q000031:analogs & derivatives / Q000097:blood*; D001714:Bipolar Disorder / Q000097:blood / Q000188:drug therapy*; D003866:Depressive Disorder / Q000097:blood / Q000188:drug therapy*; D005260:Female; D006801:Humans; D008094:Lithium / Q000097:blood; D008875:Middle Aged; D011621:Pteridines / Q000097:blood*
chemical_list: D000929:Antidepressive Agents, Tricyclic; D011621:Pteridines; D001708:Biopterins; C017226:7,8-dihydrobiopterin; D008094:Lithium