Cannabis doesn't increase blood clot risk in HIV patients, study finds

This landmark study tracked 13,646 people with HIV across multiple U.S. medical centers from 2009-2020 to investigate whether cannabis use increases the risk of venous thromboembolism (VTE)—dangerous blood clots that can be life-threatening. With 30% of participants reporting current cannabis use, researchers used advanced statistical methods to account for other health factors and found that neither former nor current cannabis users showed significantly higher VTE rates compared to those who never used cannabis.

The research is particularly significant because people with HIV already face elevated VTE risk due to their condition, raising concerns about whether adding cannabis to this existing risk could be harmful. The study found no dose-dependent relationship, meaning even frequent cannabis users did not show increased clotting risk. These findings provide reassurance that cannabis use alone does not appear to compound the blood clot risk that already exists in this vulnerable population.

However, researchers emphasize that further investigation is needed to fully understand cannabis's effects on blood clotting in people with HIV. This work contributes important evidence to the ongoing debate about cannabis safety in medically complex populations, particularly for individuals managing both HIV and seeking symptom relief through cannabis.