Cannabis Use Linked to 37% Increased Stroke Risk

Researchers at the University of Cambridge conducted a large-scale analysis involving over 100 million participants, revealing that cannabis use is linked to a 37% higher risk of stroke. The findings, published in the International Journal of Stroke, indicate that cocaine use correlates with a 96% increase in stroke risk, while amphetamines are associated with a 122% increase.

Among individuals under 55, amphetamine use showed a 174% increase in stroke risk, and cocaine use a 97% increase, with cannabis linked to a 14% increase. The study utilized meta-analysis and Mendelian randomisation to explore causal relationships.

It found that recreational drugs could trigger biological mechanisms leading to stroke, such as spikes in blood pressure and blood clotting. Dr. Megan Ritson stated that this represents the most comprehensive analysis of recreational drug use and stroke risk to date, while Dr. Eric Harshfield noted that the drugs themselves may contribute to increased risk beyond lifestyle factors.