Prenatal Cocaine Exposure Leads to More Marijuana Use by Age 21, Through Cognitive Pathways | Research

The takeaway

Children exposed to cocaine before birth had higher rates of regular marijuana use by age 21, with the pathway running through executive function deficits at age 12 and earlier substance use at 15.

Developmental psychologists, prenatal care providers, adolescent intervention researchers

50.7% of prenatal cocaine-exposed adults used marijuana regularly vs 39.4% of controls

What the researchers found

Among 310 participants tracked from birth, prenatal cocaine exposure predicted poorer executive function at age 12 (beta=0.19), which predicted substance use at 15 (beta=0.21), which strongly predicted regular marijuana use at 21 (beta=0.70). Overall, 50.7% of cocaine-exposed vs 39.4% of unexposed participants used marijuana regularly.

Why it matters

This study maps a developmental cascade from prenatal drug exposure through childhood cognitive deficits to adolescent substance use and adult marijuana use, suggesting intervention windows at each stage.

The numbers in context

310 participants (154 cocaine-exposed, 156 controls). Regular marijuana use at 21: 50.7% exposed vs 39.4% unexposed (p=.046). Indirect effect through executive function and early substance use: beta=0.028 (p=.032).

How the study worked

Longitudinal birth cohort study following 310 participants (154 cocaine-exposed, 156 controls) from birth to age 21, using structural equation modeling to test mediation pathways.

What this study cannot tell us

Cannot fully separate cocaine exposure effects from associated environmental risks. Executive function measured by caregiver report. Regular marijuana use is the outcome, which some may not consider problematic. Attrition over 21 years.

How to read the evidence

Well-powered longitudinal study spanning 21 years with structural equation modeling, though environmental confounding remains a concern.

When this study was published

2025 analysis from a birth cohort study tracking participants from birth through age 21.

The bigger picture

The findings illustrate how prenatal exposures can set off a chain of vulnerability spanning decades. Early cognitive intervention could potentially break the cycle before it reaches adolescent substance use.

Questions still open

Could early executive function training reduce later substance use risk? Are there similar pathways from prenatal cannabis exposure? At what age would intervention be most effective?

Common questions

Does prenatal cocaine exposure affect substance use later in life?

This study found 50.7% of adults exposed to cocaine before birth used marijuana regularly by age 21, compared to 39.4% of unexposed controls. The pathway went through poorer executive function in childhood and earlier substance use in adolescence.

Can early intervention prevent this pattern?

The study identified executive function deficits at age 12 as a key link in the chain, suggesting that cognitive interventions in childhood could potentially reduce the risk of later substance use in this population.

Read the original research

Cognitive and behavioral pathways from prenatal cocaine exposure to regular marijuana use during emerging adulthood.

Drug and alcohol dependence, 275, 112796

View on PubMed ↗Publisher’s paper ↗

Citation

Minnes, Sonia; Min, Meeyoung O; Kim, Sun Kyung; Balser, Sarah; Kim, June-Yung; Singer, Lynn T. (2025). Cognitive and behavioral pathways from prenatal cocaine exposure to regular marijuana use during emerging adulthood.. Drug and alcohol dependence, 275, 112796. https://doi.org/10.1016/j.drugalcdep.2025.112796