Key points
- Substance use during pregnancy can affect mothers and their babies.
- Be aware of the possible risks of opioid use during pregnancy, as well as treatment options including medications for opioid use disorder.
- Talk to your doctor about your substance use if you are pregnant or are thinking of becoming pregnant.

Overview
Opioid use during pregnancy can affect mothers and their babies. Opioids prescribed by a doctor may be used during pregnancy to manage pain. Additionally, some pregnant woman misuse prescription opioids, or use illegal opioids such as heroin and fentanyl. Nonmedical use of prescription medications can lead to an increased risk of adverse health outcomes and overdose. Combining substances, such as opioids with benzodiazepines or opioids with alcohol, can also increase the risk of drug overdose.
Polysubstance use occurs when two or more drugs are taken together, either intentionally or unintentionally. More research is needed to understand the possible effects from exposure to multiple substances during pregnancy. Substance use during pregnancy can have various effects on a developing baby.
Opioid use disorder and treatment
Opioid use disorder (OUD), sometimes referred to as opioid addiction, is a problematic pattern of opioid use that causes significant impairment or distress. Medication for opioid use disorder (MOUD) refers to the use of medication to treat opioid use disorder. Taking MOUD as prescribed during pregnancy has benefits that outweigh the risks.
It is beneficial to work together with your doctor to manage your health, including substance use, during pregnancy and after delivery. Consult your physician before stopping or changing any prescribed medication.
Health outcomes from exposure during pregnancy
Opioid exposure during pregnancy has been linked to poor health for both mothers and babies. OUD has been linked to
- Maternal death12
- Poor fetal growth
- Preterm birth
- Stillbirth
- Specific birth defects
- Neonatal abstinence syndrome34
The effects of opioid exposure during pregnancy on children over time are largely unknown. More research is needed to better understand the possible long-term outcomes related to opioid exposure during pregnancy.
Neonatal abstinence syndrome (NAS)
Opioid use during pregnancy can lead to neonatal abstinence syndrome (NAS) in some newborns. NAS is a group of conditions that can occur when newborns withdraw from certain substances, including opioids, that they were exposed to before birth.
Signs of withdrawal usually begin within 72 hours after birth and may include the following:
- Tremors (trembling) or seizures
- Sleep problems or irritability, including excessive or high-pitched crying
- Hyperactive reflexes
- Yawning, stuffy nose, or sneezing
- Poor feeding and sucking
- Loose stools and dehydration or vomiting
- Increased sweating
The symptoms a newborn might experience, and how severe the signs will be, depend on different factors. Some factors include the type and amount of substance the newborn was exposed to before birth, the last time a substance was used, whether the baby is born full-term or premature, and if the newborn was exposed to other substances (for example, alcohol5, tobacco567, other medications)5678 before birth.
- Metz TD, Rovner P, Hoffman MC, et al. Maternal deaths from suicide and overdose in Colorado, 2004–2012. Obstet Gynecol. 2016;128:1233–40.
- Smid MC, Stone NM, Baksh L, et al. Pregnancy Associated Death in Utah: Contribution of Drug-Induced Deaths. Obstet Gynecol. 2019;133(6):1131–40.
- Yazdy MM, Desai RJ, Brogly SB. Prescription Opioids in Pregnancy and Birth Outcomes: A Review of the Literature. J Pediatr Genet. 2015;4(2):56–70.
- Lind JN, Interrante JD, Ailes EC, et al. Maternal Use of Opioids During Pregnancy and Congenital Malformations: A Systematic Review. Pediatrics 2017;139(6):e20164131.
- Desai RJ, Huybrechts KF, Hernandez-Diaz S, et al. Exposure to prescription opioid analgesics in utero and risk of neonatal abstinence syndrome: Population-based cohort study. BMJ 2015;350:h2102.
- Huybrechts KF, Bateman BT, Desai RJ, et al. Risk of neonatal drug withdrawal after intrauterine co-exposure to opioids and psychotropic medications: Cohort study. BMJ 2017;358:j3326.
- Patrick SW, Dudley J, Martin PR, et al. Prescription Opioid Epidemic and Infant Outcomes. Pediatrics 2015;135(5):842–50.
- Sanlorenzo LA, Cooper WO, Dudley JA, et al. Increased Severity of Neonatal Abstinence Syndrome Associated with Concomitant Antenatal Opioid and Benzodiazepine Exposure. Hospital Pediatrics. 2019;9(8):1–7.
- Patrick SW, Barfield WD, Poindexter BB, et al. Neonatal Opioid Withdrawal Syndrome. Pediatrics 2020;e2020029074.