Central Narcotics Bureau Enforcement agency under the Ministry of Home Affairs. The Central Narcotics Bureau (CNB) directs the fight against drugs through the enforcement of Singapore’s anti- drug laws and cooperation with local and foreign organizations on drug- related matters. It also promotes a drug- free lifestyle through education and community outreach programmes. Many CNB initiatives are targeted at students, and aim to help young people understand the negative impact of drug abuse. Drugs that are strictly controlled include heroin, cannabis, methamphetamine and ketamine.