title: Chronic tension headache--treated with amitriptyline--a double-blind study.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000639:Amitriptyline / Q000008:administration & dosage* / Q000009:adverse effects; D001007:Anxiety / Q000188:drug therapy*; D002986:Clinical Trials as Topic; D003863:Depression / Q000188:drug therapy*; D005260:Female; D006261:Headache / Q000188:drug therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010919:Placebos
chemical_list: D010919:Placebos; D000639:Amitriptyline