Comparison of prophylactic use of midazolam, ketamine, and ketamine plus midazolam for prevention of shivering during regional anaesthesia: a randomized double-blind placebo controlled trial

Prophylactic use of ketamine 0.25 mg kg−1+midazolam 37.5 μg kg−1 i.v. was more effective than ketamine 0.5 mg kg−1 i.v. or midazolam 75 μg kg−1 i.v. in preventing shivering developed during regional anaesthesia.