title: Patient-controlled analgesia improves pain relief.
mesh_terms: D000293:Adolescent; D000700:Analgesics / Q000008:administration & dosage*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D007902:Length of Stay / Q000191:economics; D010146:Pain / Q000188:drug therapy*; D010149:Postoperative Pain / Q000188:drug therapy; D011247:Pregnancy; D012646:Self Administration
chemical_list: D000700:Analgesics