Drugs and addiction

What these substances actually contain, where they come from, what they do, how to spot use and how to get out. Alcohol, tobacco and screens belong here too: the line between legal and illegal is not the line of danger.

This section is not here to frighten or to moralise. It starts from a simple observation: most serious accidents happen to people who did not know what they were taking, at what dose, or what it must not be mixed with. Each page therefore says where the substance comes from, the forms it takes, what the user is looking for, what happens in the short term, what happens in the long term, and how to spot use.

Two rules that save lives

Never use alone, and never mix depressants — alcohol, benzodiazepines, opioids. The great majority of deaths follow one of those two failures rather than the toxicity of a single substance.

The substances, one by one

Spotting, helping, reporting

The law country by country

Use, possession and supply are not punished the same way from one country to the next: a fixed penalty here, a prison term there, mandatory treatment in some cases, capital punishment for trafficking in a few countries. Being a minor, the quantity, the substance and whether you were driving change the exposure completely. Each page gives the applicable law, the penalties, how minors are treated, the rules at the wheel and the treatment services.

Select a country to open its detailed page.

European framework

European Union

A common minimum on trafficking, and complete freedom left to member states on personal use.

Britain and Ireland

United Kingdom

A three-class system dating from 1971, with penalties that depend on the class and on whether supply is involved.

Ireland

Possession is an offence under the 1977 Act, with a health-led approach introduced for a first cannabis offence.

North America

United States

Federal prohibition alongside state legalisation: cannabis is lawful in most states and a federal crime everywhere.

Canada

Cannabis legal and regulated since 2018; everything else falls under the CDSA.

Australia and New Zealand

Australia

Criminal law is state law, with diversion schemes almost everywhere and a decriminalised territory in the middle.

New Zealand

A 1975 statute, a 2019 amendment directing police discretion towards health, and a referendum that narrowly said no.

South Asia

India

A 1985 Act with mandatory minimums keyed to quantity, and a statutory route to treatment instead of punishment.

Pakistan

A 1997 Act keyed to quantity, with life imprisonment and the death penalty available above ten kilograms.

South-East and East Asia

Singapore

The strictest regime covered on this site: capital punishment for trafficking above set weights, and a statutory presumption of trafficking from quantity alone.

Malaysia

Capital or life punishment for trafficking, a presumption keyed to weight, and cannabis now permitted for medical use only.

Philippines

A 2002 Act with life imprisonment for most trafficking offences, following a campaign that killed thousands.

Hong Kong

A 1969 Ordinance with life imprisonment for trafficking, applied by a specialist sentencing practice keyed to quantity.

Africa

South Africa

Private adult use and cultivation of cannabis are lawful following the Constitutional Court; dealing remains a serious offence.

Nigeria

Possession and trafficking under a modern statute, with treatment capacity concentrated in the main cities.

Kenya

Possession and trafficking under a modern statute, with treatment capacity concentrated in the main cities.

Ghana

Possession and trafficking under a modern statute, with treatment capacity concentrated in the main cities.

Uganda

Possession and trafficking under a modern statute, with treatment capacity concentrated in the main cities.

Zambia

Possession and trafficking under a modern statute, with treatment capacity concentrated in the main cities.

The Caribbean

Jamaica

Small amounts of ganja decriminalised in 2015, with a licensed medical and religious framework alongside.

Trinidad and Tobago

Cannabis decriminalised for adults in 2019, with cultivation permitted at home and a licensing framework for the rest.

This topic is also covered for French-speaking countries · German-speaking countries · Spanish-speaking countries · Italy and Italian-speaking Switzerland · Portuguese-speaking countries · the Netherlands, Flanders and Suriname.

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Page checked in September 2026. The instruments cited can change: if in doubt, confirm with the official source given.

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