title: Back pain after epidural analgesia.
mesh_terms: D000328:Adult; D000368:Aged; D000375:Aging; D000698:Analgesia / Q000009:adverse effects*; D000775:Anesthesia, Spinal / Q000009:adverse effects*; D001416:Back Pain / Q000139:chemically induced*; D004837:Epinephrine / Q000009:adverse effects; D005260:Female; D006801:Humans; D008012:Lidocaine / Q000009:adverse effects; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000209:etiology; D011187:Posture; D012723:Sex
chemical_list: D008012:Lidocaine; D004837:Epinephrine