Drug Prevention
What Works in Drug Prevention: An Evidence Summary
Which prevention approaches reduce youth substance use, which do not, and why scare tactics usually fail.
Drug prevention has been studied for more than forty years, and the research points in a clear direction. Programs that build skills, change norms and involve families tend to work. Programs that rely on fear, one-off assemblies or information alone usually do not.
Approaches with good evidence
- Social and emotional skills training. Curricula that teach decision-making, coping with stress and refusing offers, delivered over several sessions, reduce early use of alcohol, tobacco and cannabis. Examples studied in randomized trials include LifeSkills Training and the Good Behavior Game for younger children.
- Correcting norms. Many teenagers overestimate how many of their peers drink or use drugs. Showing them accurate local survey data lowers the pressure to "keep up".
- Family programs. Interventions that improve parent monitoring, communication and consistent rules, such as the Strengthening Families Program, show effects that last into young adulthood.
- Environmental policy. Minimum legal drinking ages, alcohol taxes, limits on outlet density and enforcement against sales to minors reduce youth drinking at the population level. Social host laws, which hold adults responsible for underage drinking parties on their property, belong in this group.
- Brief interventions. A short, structured conversation with a doctor, nurse or school counselor, using motivational interviewing, can reduce risky drinking among adolescents and young adults.
Approaches with weak or negative evidence
- Scare tactics. Graphic images and exaggerated claims tend to be dismissed by young people, especially when they know peers who used without obvious harm. Credibility, once lost, is hard to regain.
- Information-only lectures. Knowing the pharmacology of a drug does not on its own change behavior.
- One-time events. A single assembly or guest speaker rarely has measurable effects.
- Ex-user testimonials alone. Stories can engage attention, but some studies find they can unintentionally signal that recovery is easy or that use is common.
Timing matters
The risk of developing a substance use disorder is substantially higher when use starts in early adolescence. Delaying the first drink or first use of cannabis by even a few years is a worthwhile goal on its own, which is why most effective programs start in late primary school or early middle school.
Sources and further reading
The UNODC and WHO International Standards on Drug Use Prevention rate interventions by strength of evidence for each age group. In the United States, SAMHSA's Evidence-Based Practices Resource Center and the Blueprints for Healthy Youth Development registry list programs that have passed rigorous evaluation.
This article is for general education and is not a substitute for advice from a qualified health professional.
