Monday, 1. August 2016

Is cannabis really getting stronger?


Cannabis continues to be the world’s favourite illicit drug with around 147m people using it annually. However, there are fears that the drug is becoming increasingly potent and that it could pose a public health risk. But how reliable is the evidence? And is it really getting stronger? The debate about cannabis potency and harm is long running. In the UK, where there are 2m annual users, it predates the 2004 downgrading of cannabis classification from class B to class C. But this episode demonstrated some of the issues with estimating the harms of the drug. Research conducted at the time highlighted how the relative harms of cannabis compared with other class B substances was one of the factors behind the decision to reclassify. However, critics accused the government of ignoring emerging evidence that cannabis was becoming more potent and that it represented a serious public health problem.

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