title: Unexplained pain during epidural analgesia.
mesh_terms: D000328:Adult; D000767:Anesthesia, Epidural / Q000009:adverse effects*; D000773:Anesthesia, Obstetrical / Q000009:adverse effects*; D002045:Bupivacaine / Q000009:adverse effects; D005260:Female; D006801:Humans; D007744:Obstetric Labor Complications / Q000209:etiology; D010146:Pain / Q000209:etiology*; D011247:Pregnancy
chemical_list: D002045:Bupivacaine