Substance abuse in Kenyan secondary schools — prevention and early intervention

Substance abuse among secondary school students has been repeatedly identified — including in NACADA (National Authority for the Campaign Against Alcohol and Drug Abuse) reports — as a contributing factor in some incidents of school disciplinary breakdown and unrest in Kenya. This guide focuses on practical, evidence-based prevention and early intervention rather than punitive-only responses, which research consistently shows are less effective at changing behaviour long-term.

Understanding the scale and nature of the issue

NACADA’s national surveys have consistently found that alcohol, tobacco, and in some regions bhang, remain the most commonly reported substances among secondary school students, with usage typically beginning through peer influence and curiosity rather than dependency. Recognising this as primarily a behavioural and social issue — not simply a disciplinary one — shapes a more effective response.

Prevention — the highest-return investment

Age-appropriate, honest education

Programmes that rely on fear-based messaging or exaggeration have been shown, in both Kenyan and international research, to be less effective than honest, factual education about risks, combined with building students' refusal skills for peer pressure situations. NACADA provides curriculum resources for schools that are more effective than ad hoc assemblies.

Addressing root causes, not just the behaviour

Substance use in adolescents is frequently linked to underlying stress, a need for peer acceptance, or in some cases, an attempt to cope with difficult circumstances at home. A prevention approach that only addresses the substance use itself, without addressing why a student turned to it, is less likely to produce lasting change than one that also strengthens the student’s coping resources and support network.

Peer-led approaches

Programmes where trained student peer educators lead conversations about substance use, rather than only adult-led lectures, have shown stronger engagement in Kenyan secondary school contexts. Students are often more willing to discuss these topics honestly with peers than with authority figures.

Early warning signs for staff

• A noticeable decline in academic performance without another clear explanation
• Changes in peer group, particularly withdrawal from previous friendships toward a new group
• Unexplained absences or repeated lateness, particularly after weekends or breaks for day scholars
• Physical signs — smell of alcohol or tobacco, unusual drowsiness or hyperactivity
• Increased disciplinary incidents that seem out of character for the student

How to respond when substance use is identified

A purely punitive response — suspension or expulsion as the first and only response — is not required by policy in most cases and is often less effective at changing behaviour than a response that combines appropriate consequence with genuine support. Kenyan schools that have managed this well typically involve the guidance counsellor immediately, engage parents as partners rather than only informing them of a punishment, and where the situation suggests dependency rather than experimentation, refer the family to NACADA’s rehabilitation and counselling services.

Working with parents

Parents are often the last to know when their child is using substances, and their initial reaction is frequently denial or shame rather than partnership. A school that approaches this conversation with parents from a place of shared concern for the student’s wellbeing, rather than blame, is more likely to secure genuine parental engagement in the solution.

Building a whole-school prevention culture

Schools with lower rates of substance-related incidents typically share a culture where students have strong positive peer relationships, active engagement in sports and extracurricular activities, and a sense of belonging to the school community. Investment in these areas is, in a real sense, substance abuse prevention — even when not explicitly framed that way.