Comparison of prophylactic use of meperidine and two low doses of ketamine for prevention of post-anesthetic shivering: A randomized double-blind placebo controlled trial.

Background: Postanesthetic shivering is one of the most common complications of anesthesia. We compared the efficacy of meperidine and two low doses of ketamine with placebo to prevent postanesthetic shivering after general anesthesia.

Methods: This was a prospective, randomized double-blind placebo controlled clinical trial involving 120 ASA I-II patients aging 20-50 years, undergoing endoscopic sinus surgery with general anesthesia.