RT Book, Section A1 I. Colella, Merry A1 Li, Yunping A2 Hess, Philip E. A2 Li, Yunping A2 Kowalczyk, John J. A2 Stiles, Justin K. SR Print(0) ID 1199673560 T1 Opioid Use Disorders T2 Obstetric Anesthesia: Quick References & Practical Guides YR 2023 FD 2023 PB McGraw Hill PP New York, NY SN 9781264671465 LK obgyn.mhmedical.com/content.aspx?aid=1199673560 RD 2024/03/28 AB Substance use in pregnancy has escalated in recent years. Opioid-dependent patients frequently have severe postoperative pain due to opioid-induced hyperalgesia or tolerance.1 Chronic use of either buprenorphine or methadone can result in these states.