Hirata, Ikkou, et al. “Droperidol Reduces Postoperative Nausea and Vomiting and Supports the Continuation of Intravenous Patient-Controlled Analgesia With Fentanyl”. Journal of Pharmacy & Pharmaceutical Sciences, vol. 23, no. 1, June 2020, pp. 220-3, doi:10.18433/jpps30902.