How do recreational drugs raise stroke risk?
Large-scale data links some recreational drugs to higher stroke risk
A study analysing medical records from roughly 100 million people found stronger risks of stroke associated with recreational stimulant and drug use. The analysis reported increased stroke risk of about 122% for amphetamines, 96% for cocaine and 37% for cannabis compared with people who did not use those drugs. The findings describe associations, not a single proved causal mechanism, but they align with what clinicians understand about the vascular effects of these substances.
Stimulant drugs such as amphetamines and cocaine can sharply raise heart rate and blood pressure, trigger blood‑vessel spasm, and increase the chance of clot formation or bleeding in the brain — all mechanisms that can lead to ischaemic or haemorrhagic stroke. Cannabis appears linked to a smaller but still meaningful rise in risk; explanations may include effects on blood pressure, heart rhythm or combined use with other substances.
Public‑health and clinical implications
- Clinicians should routinely ask about recreational drug use when assessing stroke risk, especially in younger patients with no other clear causes.
- People who use these substances need clear, non‑judgmental information about the increased risk and advice on how to reduce harm.
- Emergency services and urgent care pathways should maintain awareness that younger adults presenting with stroke symptoms may have recent drug exposure.
The study strengthens the evidence that recreational drug use contributes to stroke burden at a population level. Reducing harms will require prevention, harm‑reduction services and better integration of substance‑use care into cardiovascular risk management.