Data shows that the average age category for initiation of tobacco, alcohol, khat, cannabis, prescription drugs, cocaine, and heroin is 16 - 20 years.
However, the minimum age of initiation for tobacco is 6 years, alcohol (7 years), cannabis (8 years), khat (9 years), prescription drugs (8 years), heroin (18 years) and cocaine (20 years).
Survey established that alcohol continues to be the most widely used substance of abuse in Kenya with findings pointing towards increasing demand for cheaper and readily available.