["To evaluate the effect of preoperative oral tramadol on postoperative pain and its effect on the patient's home-readiness after diagnostic day-case knee arthroscopy performed under spinal anaesthesia.", 'We studied 156 outpatients in a prospective, randomized, double-blind fashion to examine the postoperative analgesic effect of preoperative oral slow-release tramadol. Postoperative pain was measured using a 100-mm visual analogue scale (VAS). Postoperative nausea and vomiting (PONV) and the patients home-readiness were assessed.', 'There were no statistically significant differences in the postoperative VAS scores between the tramadol and placebo groups, nor was there any significant difference in the need for postoperative pain medication. Patients in the tramadol group had higher incidence of PONV and they were discharged from hospital later than those given placebo although the tramadol patients required less intravenous midazolam for sedation.'] Does peroral tramadol premedication increase postoperative nausea and delays home-readiness in day-case knee arthroscopy patients?