Prophylactic Mirtazapine or Clonidine for Post-spinal Anesthesia Shivering

Each patient received 30 mg mirtazapine tablet and a placebo tablet for clonidine orally with sips of water 2 h preoperatively.

Each patient received 150 µg clonidine tablet and a placebo tablet for mirtazapine orally with sips of water 2 h preoperatively.

Each patient received two placebo tablets for mirtazapine and clonidine orally with sips of water 2 h preoperatively.