title: Primary dysmenorrhea: the therapeutic challenge.
mesh_terms: D000700:Analgesics / Q000627:therapeutic use; D002681:China; D002986:Clinical Trials as Topic; D004359:Drug Therapy, Combination; D004412:Dysmenorrhea / Q000188:drug therapy* / Q000209:etiology / Q000266:history; D004967:Estrogens / Q000627:therapeutic use; D005260:Female; D000076145:Greece, Ancient; D049690:History, Ancient; D006801:Humans; D009288:Naproxen / Q000009:adverse effects / Q000627:therapeutic use; D010919:Placebos; D011374:Progesterone / Q000627:therapeutic use; D011448:Prostaglandin Antagonists / Q000627:therapeutic use*; D011453:Prostaglandins / Q000096:biosynthesis; D014481:United States
chemical_list: D000700:Analgesics; D004967:Estrogens; D010919:Placebos; D011448:Prostaglandin Antagonists; D011453:Prostaglandins; D011374:Progesterone; D009288:Naproxen