A landmark University of Virginia study reveals that regular cannabis smoking doubles stroke risk among young adults aged 18-44. Mixing it with tobacco makes risks even higher.
While cannabis is well-known for its neurological effects, mounting evidence from cardiovascular experts highlights serious heart and vascular concerns. Smoking marijuana elevates heart rate and blood pressure while hindering oxygen delivery throughout the body.
Researchers at the University of Virginia analyzed records from 43,860 U.S. participants aged 18-44. Of these, 13.6% reported marijuana use in the past 30 days.
Their findings: Regular users—defined as more than 10 joints per month—faced 2.5 times higher stroke odds compared to non-users, even when smoking pure cannabis without tobacco.
Those combining cannabis with tobacco were at an even greater risk, being nearly three times more likely to suffer a stroke.
"Although cannabis is not as harmful and addictive as other substances, we cannot ignore its potential health risks," said lead author Tarang Parekh. These results will be presented at the American Heart Association's annual meeting in Philadelphia.
This observational study identifies an association, not direct causation—factors like heavy alcohol use may contribute.
Stroke mechanisms linked to cannabis remain under study, but experts suggest it may promote blood clots or vessel narrowing. More research is essential to clarify these pathways.
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