Postoperative Discharge Opioid Consumption, Leftover, and Disposal after Obstetric and Gynecologic Procedures: A Systematic Review

Abstract

To perform a systematic review on consumption, leftover, and disposal of prescribed opioids after surgery in obstetrics and gynecology (The International Prospective Register of Systematic Reviews ID 249856). Electronic database searches on PubMed, Embase, Cochrane Library, and MEDLINE and other search methods including all studies published between the years 2000 and 2021 were used. We included all randomized trials, cohorts, case-control studies, and clinical trials. The search was limited to studies related to obstetrics and gynecology. Studies that pertained to opioid consumption, leftover, and disposal patterns were selected. We excluded review articles, meeting abstracts, case series and case reports, and abstracts without access to full texts. The search was limited to trials in humans and published in English language. Study population included women who were prescribed opioids after obstetric and/or gynecologic procedures. Information on opioid consumption, leftover, and disposal patterns were extracted and compared among different procedures. Potential risk of bias was evaluated using the Newcastle-Ottawa Scale for cohort studies and the National Heart, Lung, and Blood Institute Study Quality Assessment Tool of Controlled Interventional Studies for clinical trial. Of 2343 articles, 10 were used in the analysis: 9 cohorts and 1 randomized clinical trial. We found that among patients who underwent obstetric and gynecologic procedures, a considerable number of opioids are unused. The total number of consumed opioids after discharge in patients who underwent cesarean delivery was 21.8 oral morphine equivalent (OME); vaginal hysterectomy, 55.7 OME; abdominal hysterectomy, 105.8 OME; and laparoscopic hysterectomy, 89.0 OME. The number of opioids leftover in the vaginal, abdominal, and laparoscopic hysterectomy groups was 67.6 OME, 115.5 OME, and 95.3 OME, respectively. On average, 77.5% of leftover opioids were not disposed/kept, whereas only 20% discarded their medication through a disposal program. Five studies were deemed to have fair quality, and the rest were rated as good quality. Compared with those after cesarean delivery, patients undergoing gynecologic procedures consumed a large number of opioids, especially after abdominal hysterectomies. Abdominal hysterectomy was also associated with a high number of opioids leftover. Most patients did not use the entire prescribed opioids and were either keeping their unused opioids or unsure about what to do with them. We recommend perioperative opioid-specific counseling and education on opioid consumption, potential hazards of unused medication, and proper disposal for patients. Strategies to reduce opioids prescription by physicians should be considered.