Opioid Use Disorder Treatment in Pregnant Women

Introduction

Opioid use disorder in pregnant women is associated with risks such as stillbirth, poor fetal growth, preterm delivery, and birth defects, as well as neonatal opioid withdrawal syndrome, emphasizing the need for careful consideration and monitoring 1, 2

The American College of Obstetricians and Gynecologists (ACOG) and the Society for Maternal-Fetal Medicine (SMFM) recommend medication-assisted therapy (MAT) with either methadone or buprenorphine, combined with comprehensive behavioral support services, for pregnant women with opioid use disorder, rather than attempting detoxification or withdrawal 3, 1, 2
Methadone is associated with higher retention in treatment, reduced pregnancy complications, higher birth weights, decreased HIV risk behaviors, decreased fetal mortality, and improved adherence to prenatal care 3
Buprenorphine may reduce the severity and frequency of Neonatal Opioid Withdrawal Syndrome (NOWS), has a more flexible dosing schedule, is less stigmatizing, and has fewer drug interactions 3

Trauma-informed care, housing assistance, transportation support, and childcare services are recommended for pregnant women with opioid use disorder, given the high rates of childhood trauma and interpersonal violence 3

Acetaminophen is a reasonable choice for pain and/or fever treatment during pregnancy, to be used at the lowest effective dose for the shortest possible duration, with caution due to emerging concerns about potential neurodevelopmental effects, as recommended by SMFM and ACOG 4, 5, 3, 6, 7
The maximum daily dose of acetaminophen should not exceed 3000-4000 mg, with monitoring across all trimesters, as recommended by ACOG 3, 6, 7, 5
NSAIDs, such as ibuprofen, may be used for short-term (7-10 days) in the second trimester only, at a dosage of 600 mg every 6 hours, but are contraindicated in the first trimester due to the risk of congenital malformations and strongly contraindicated in the third trimester due to the risk of premature closure of ductus arteriosus, as recommended by the American College of Rheumatology 8, 6, 9, 10, 11, 12
A stepwise approach for treating sciatica pain during pregnancy is recommended, starting with non-pharmacological methods and acetaminophen, reserving NSAIDs for short-term use in the second trimester, and opioids for severe unresponsive pain, as suggested by ACOG 3, 9

Step	Recommendation	Citation
First-line	Non-pharmacological interventions and acetaminophen (650 mg every 6 hours or 975 mg every 8 hours)	[3, 6, 7, 5]
Second-line	In the second trimester only: NSAIDs at the minimum effective dose for a limited time	[6, 10, 11]
Third-line	For severe pain: Referral to a specialist for evaluation and consideration of low-dose opioids	[3, 6, 7]

Coordination with addiction treatment providers, maintenance of MAT during labor, planning for pain management during labor and postpartum, and arrangement of delivery at a facility equipped to manage NOWS are crucial for pregnant women with opioid use disorder 3

Continuing MAT medication throughout labor and postpartum, using a multimodal pain management approach, and providing intensive support to prevent relapse during the high-risk postpartum period are recommended 3
Acetaminophen is compatible with breastfeeding, and short courses of ibuprofen are generally considered safe during breastfeeding, while opioids should be avoided during breastfeeding when possible, as recommended by ACOG 3, 6, 13

For suspected infection-related sciatica, antibiotics that are safe in pregnancy, such as amoxicillin-clavulanic acid or penicillin/cephalosporin class, may be considered, with a moderate to high strength of evidence, as supported by the American Gastroenterological Association and the American College of Gastroenterology 14, 15, 16
Metronidazole can be safely used for infected conditions in pregnant women, as supported by the American Gastroenterological Association and the American College of Gastroenterology, with a high strength of evidence 15, 16