1, Objective To compare the effects of dexamethasone with droperidol on postoperative epidural analgesia for caesarean operation.

2, Objective To evaluate the safety of low dose droperidol given intravenously before surgery.

3, Objective To compare the effects between dexamethasone and droperidol on postoperative epidural analgesia for Caesarean operation.

4, The company's products are artemisinin - based antimalarial category droperidol quinoline compound artemisinin tablets and granules.

5, Objective:To explore the clinical effect of different administration juncture of pethidine and droperidol mixture during epidural anaesthesia of laparoscopic surgery.

6, If nausea and vomiting persist despite successful treatment of hypotension, diazepam or droperidol may be effective.