Evaluation of the Role of Preoperative Oral Amisulpride as Part of a Multimodal Antiemetic Prophylaxis Regime on Postoperative Nausea and Vomiting in Patients Undergoing Craniotomy: A Prospective, Double-Blind, Randomized, Placebo-controlled Study.

Background: Patients undergoing craniotomy are at high risk for postoperative nausea and vomiting (PONV) despite the use of prophylactic antiemetics. We hypothesized that a single preoperative oral dose of amisulpride as part of a multimodal antiemetic regimen would decrease the incidence of PONV in patients undergoing craniotomy for intracranial tumor surgery.

Methods: Adult patients scheduled for elective craniotomy requiring general anesthesia were enrolled and randomized to receive either oral amisulpride 25 mg or placebo 2 hours before surgery in addition to our institution's usual antiemetic regimen. The primary outcome of the study was the incidence of nausea and/or vomiting during the first 24 hours postoperatively. Secondary outcomes included severity of nausea, use of rescue antiemetic medications, and treatment-related adverse events.

Results: A total of 100 patients were included in the analysis. More patients in the amisulpride group had no episodes of nausea (90% vs. 40%; P <0.001) and no episodes of vomiting (94% vs. 46%; P <0.001) compared with the placebo group. The severity of nausea was lower in the amisulpride group than in the control group in the first 4 hours after surgery ( P <0.05), and fewer patients receiving amisulpride required rescue antiemetics ( P <0.001). The incidence of treatment-related adverse events was similar between groups.

Conclusions: A single preoperative oral dose of amisulpride 25 mg as a component of a multimodal antiemetic regimen decreased the incidence and severity of PONV in patients undergoing craniotomy for intracranial tumor surgery, with no adverse effects.