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Central Narcotics Bureau (CNB)

Harms of Cannabis

Cannabis is harmful and addictive. It can damage the brain and is linked to serious mental health issues, thus reinforcing Singapore’s stance to keep it illegal.

Last updated 20 November 2025

Understanding Cannabis

Infographic of what is Cannabis

Negative effects of Cannabis use

Singapore’s drug control policies are underpinned by evidence and research. A comprehensive literature review conducted by the Institute of Mental Health experts (published in 2016) affirmed the addictive and harmful nature of cannabis, and that it damages the brain. Cannabis use is also associated with serious mental health illnesses.

These findings corroborate Singapore’s position that cannabis should remain an illicit drug.

Link: Institute of Mental Health’s study: “A Literature Review on Medical Cannabis” [PDF, 147 KB]

collage of 6 images on cannabis use
Collage of 4 images about Cannabis use.