Determination of the ED90 for Epidural Hydromorphone and Morphine for Postoperative Pain Using a Biased-Coin Up-and-Down Sequential Design After Elective Cesarean Delivery

Tang X, Liang Y, Hu Y, Li P, Wang J, Wang Y, Xie M

Drug Design, Development and Therapy 2026, 20:588767

Published Date: 9 June 2026