title: Pupillary constriction following extradural analgesia.
mesh_terms: D000698:Analgesia / Q000009:adverse effects; D000767:Anesthesia, Epidural / Q000009:adverse effects*; D003250:Constriction; D006259:Craniocerebral Trauma / Q000188:drug therapy; D006801:Humans; D008012:Lidocaine / Q000009:adverse effects; D011680:Pupil / Q000187:drug effects
chemical_list: D008012:Lidocaine