A new study involving more than 440,000 Americans has found that cannabis use is associated with elevated cardiovascular risk, with occasional marijuana users showing 40 percent higher odds of reporting a history of stroke compared with non-users. The research, published amid growing legalization and public acceptance of cannabis across the United States, suggests that even infrequent use may warrant clinical concern. According to the findings, the link persisted after researchers accounted for factors including tobacco use, alcohol consumption, and other lifestyle variables, though the study's observational design limits the conclusions that can be drawn.
Researchers cautioned that the findings do not establish that cannabis directly causes strokes or heart disease. The study relied on self-reported data, and scientists noted that underlying mechanisms remain unclear, with possible explanations including effects on blood vessels, blood pressure, or clotting. Public health experts said the results underscore the need for further investigation as cannabis use becomes more widespread. The authors recommended that clinicians discuss cardiovascular risks with patients who use marijuana, even occasionally, and called for longitudinal studies to better determine whether a causal relationship exists.
Independent reporting synthesized from primary wires and global correspondents.