Medical data from 100m people shows risk 122% higher for amphetamine users, 96% higher for cocaine and 37% higher for cannabis

Recreational drugs can more than double the risk of stroke, with some of the most concerning impacts seen among younger people, a major review suggests.

Scientists analysed medical data from more than 100 million people and found that the risk of stroke was 122% higher for amphetamine users and 96% higher for cocaine users compared with those who did not take the drugs.

Cannabis users were also at greater risk, suffering 37% more strokes than non-users, the review found, though researchers saw no evidence that opioids, a highly addictive painkiller, added to a person’s risk of stroke.

The rise in strokes observed in connection with some drugs was not confined to older people. When researchers focused on under-55s, they saw a near tripling in stroke risk among amphetamine users. The additional risk linked to cannabis was a more modest 14% in the age group, while the risk from cocaine was much the same at 97%.