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Drug Offences

Singapore drug offence guides — possession, consumption and trafficking under the Misuse of Drugs Act, with penalties, presumptions and defences.

Drug offences are among the most heavily regulated areas of Singapore criminal law, covering conduct from possession and consumption to trafficking under the Misuse of Drugs Act. The way a case is treated depends closely on the type of drug, the quantity involved, and the exact charge.

The guides here explain how these offences are framed, the concepts that often arise — such as statutory presumptions — the defences that may be available, and what the process looks like from arrest onward. Because the stakes in drug cases can be very high, early legal advice is essential. If you or someone close to you is under investigation for a drug matter, speak to a criminal lawyer before giving any statement.

Zainudin bin Mohamed v Public Prosecutor (drug courier and alternative sentencing)

Educational summary of a named public judgment, drawn from the court’s published grounds. Stated neutrally and non-graphically. Not legal advice. Zainudin bin Mohamed v Public Prosecutor [2018] SGCA 8; [2018] 1 SLR 1049 is the leading Court of Appeal decision on who counts as a “courier” for the purposes of the alternative-sentencing regime in section […]

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Drug consumption and long-term imprisonment in Singapore (Geevanathan)

Educational summary of named public judgments. Not legal advice. Consuming a controlled drug is an offence in Singapore, and repeat consumers face sharply escalating penalties under the long-term imprisonment (LT) regime. This case study explains the scheme under the Misuse of Drugs Act and illustrates it with Geevanathan s/o Thirunavakarusu v Public Prosecutor [2023] SGHC […]

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Gobi a/l Avedian v Public Prosecutor

Educational summary of a named public judgment, drawn from the court’s published grounds. Stated neutrally and non-graphically. Not legal advice. Gobi a/l Avedian v Public Prosecutor [2020] SGCA 102; [2021] 1 SLR 180 is a landmark Court of Appeal decision on the drug presumptions in the Misuse of Drugs Act. It is significant both for […]

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Adri Anton Kalangie v Public Prosecutor

Educational summary of named public judgments. Not legal advice. Adri Anton Kalangie v Public Prosecutor [2018] SGCA 40 is a Court of Appeal decision on two things at once: the sentencing framework for importing methamphetamine below the capital threshold, and the important question of whether a new sentencing framework applies to offences committed before it […]

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Suventher Shanmugam v Public Prosecutor

Educational summary of a named public judgment. Not legal advice. Suventher Shanmugam v Public Prosecutor [2017] SGCA 25; [2017] 2 SLR 115 is a key Court of Appeal decision on how Singapore sentences the importation of cannabis in quantities below the capital threshold. It took the quantity-then-culpability logic from the earlier High Court decision in […]

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Vasentha d/o Joseph v Public Prosecutor

Educational summary of a named public judgment. Not legal advice. Vasentha d/o Joseph v Public Prosecutor [2015] SGHC 197; [2015] 5 SLR 122 is a foundational Singapore drug-sentencing decision. It set out a structured, step-based framework for sentencing trafficking in diamorphine in quantities below the threshold that attracts capital punishment, and its reasoning was later […]

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