A Review of How Combined Alcohol and Cannabis Use During Pregnancy May Compound Risks to Fetal Brain Development
Simultaneous alcohol and cannabis use is increasingly common among people of childbearing age, and while both substances independently harm fetal brain development, their combined prenatal effects are virtually unstudied despite evidence that co-use amplifies each drug's effects.
Quick Facts
What This Study Found
Both alcohol and cannabinoids independently impact fetal neurodevelopment with lifelong consequences. Simultaneous alcohol-cannabinoid (SAC) use amplifies each drug's pharmacodynamic effects and increases craving for both substances. However, prenatal polysubstance investigations are extremely limited in both human and animal populations. The review identifies shared prenatal targets from single-exposure studies that may represent particularly vulnerable neurobiological mechanisms.
Key Numbers
No specific quantitative data. Review identifies shared neurobiological targets and notes increasing rates of simultaneous use among people of childbearing age.
How They Did This
Narrative review addressing combined alcohol and cannabinoid exposure, including direct and prenatal effects, with identification of shared neurobiological targets from single-exposure paradigms.
Why This Research Matters
Research has focused on each substance separately, but real-world use increasingly involves both. The pharmacological interaction between alcohol and cannabinoids suggests combined prenatal exposure could be worse than either alone, yet this is largely unexamined.
The Bigger Picture
As cannabis legalization expands, co-use with alcohol is becoming more common. Prenatal care guidelines address each substance separately, but the combined risk profile remains a blind spot in both research and clinical practice.
What This Study Doesn't Tell Us
Narrative review identifying a research gap rather than synthesizing existing data. Very few studies of combined prenatal exposure exist. Proposed shared mechanisms are hypothetical and require experimental confirmation. Human polysubstance exposure studies face major ethical and methodological challenges.
Questions This Raises
- ?Do alcohol and cannabis have synergistic effects on fetal brain development?
- ?Should prenatal screening specifically assess for simultaneous alcohol-cannabis use?
Trust & Context
- Key Stat:
- Combined prenatal alcohol-cannabis exposure is virtually unstudied despite increasing co-use
- Evidence Grade:
- Narrative review identifying a major research gap. Integrates single-exposure evidence to propose shared mechanisms.
- Study Age:
- Published in 2023.
- Original Title:
- Alcohol & cannabinoid co-use: Implications for impaired fetal brain development following gestational exposure.
- Published In:
- Experimental neurology, 361, 114318 (2023)
- Authors:
- Rouzer, Siara Kate(2), Gutierrez, Jessica, Larin, Kirill V, Miranda, Rajesh C
- Database ID:
- RTHC-04902
Evidence Hierarchy
Summarizes existing research on a topic.
What do these levels mean? →Frequently Asked Questions
Is using alcohol and cannabis together during pregnancy worse than either alone?
Research suggests that simultaneous use amplifies each drug's effects, but combined prenatal exposure is virtually unstudied. Both substances independently harm fetal brain development.
Why hasnt this been studied?
Most prenatal substance research examines one drug at a time. Combined exposure studies face ethical constraints in humans and are only beginning in animal models.
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-04902APA
Rouzer, Siara Kate; Gutierrez, Jessica; Larin, Kirill V; Miranda, Rajesh C. (2023). Alcohol & cannabinoid co-use: Implications for impaired fetal brain development following gestational exposure.. Experimental neurology, 361, 114318. https://doi.org/10.1016/j.expneurol.2023.114318
MLA
Rouzer, Siara Kate, et al. "Alcohol & cannabinoid co-use: Implications for impaired fetal brain development following gestational exposure.." Experimental neurology, 2023. https://doi.org/10.1016/j.expneurol.2023.114318
RethinkTHC
RethinkTHC Research Database. "Alcohol & cannabinoid co-use: Implications for impaired feta..." RTHC-04902. Retrieved from https://rethinkthc.com/research/rouzer-2023-alcohol-cannabinoid-couse-implications
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.