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Classification of Controlled Drugs Under the Misuse of Drugs Act 1971

The Misuse of Drugs Act 1971 is a key piece of legislation in the UK that categorizes drugs into three classes based on their potential for harm and the severity of penalties for unauthorized possession, supply, and production. The classification system is designed to control the use of these substances and to penalize their misuse. The Act also lays down the legal framework for the manufacture, supply, and possession of these drugs, which is further detailed in regulations such as the Misuse of Drugs Regulations 2001.


The Misuse of Drugs Act 1971 is a key piece of legislation in the UK that categorizes drugs into three classes based on their potential for harm and the severity of penalties for unauthorized possession, supply, and production. The classification system is designed to control the use of these substances and to penalize their misuse. The Act also lays down the legal framework for the manufacture, supply, and possession of these drugs, which is further detailed in regulations such as the Misuse of Drugs Regulations 2001.


Drug ClassDescriptionExamples of Substances
Class AHighest harm category under the Act. Prohibits manufacture, supply, and possession except under specified regulations or state license.• Alfentanil...

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