Marijuana and the Heart: A Silent Risk Increasing with Use

4th June 2025

2 minutes read

Marijuana and the Heart: A Silent Risk Increasing with Use

As marijuana legalization continues to expand across the globe and its use becomes more normalized, medical experts are raising serious concerns about the growing risk it poses to cardiovascular health.

Often underestimated effects

Traditionally labeled as a “soft drug,” marijuana is frequently regarded as harmless, or even beneficial, particularly for its relaxing and therapeutic effects. However, recent studies increasingly point to a troubling connection between regular cannabis use and serious heart problems, including arrhythmias, hypertension, myocardial infarction, and strokes.

The heart under stress

Tetrahydrocannabinol (THC), the main psychoactive compound in marijuana, acts on cannabinoid receptors found in both the nervous and cardiovascular systems. It can trigger a sudden increase in heart rate, fluctuations in blood pressure, and reduced oxygen delivery to the blood, placing considerable strain on the heart — especially in individuals with existing cardiovascular conditions.

According to a study published in the Journal of the American Heart Association, young adults who regularly consume cannabis face a heightened risk of cardiac events, even when traditional risk factors like smoking or obesity are absent.

A hidden threat among young people

One of the most concerning aspects of this issue is that the risk remains largely unknown, particularly among young users, who are the primary recreational consumers of marijuana. Many are unaware that this substance, often associated with a “natural” or “healthy” lifestyle, can have long-term health consequences, especially when smoked or inhaled, further contributing to pulmonary toxicity.

Health authorities urge caution

Medical associations and cardiologists are calling for more extensive research and clearer public communication about marijuana’s cardiovascular risks, especially in prevention campaigns aimed at young adults. Healthcare providers are also encouraged to routinely ask patients about their cannabis use, particularly when cardiovascular symptoms are present.

Toward greater public awareness

With the proliferation of cannabis-based products — from dried flower and oils to edibles — the public perception of marijuana as a “harmless” substance needs urgent reassessment. Despite its growing social acceptance, marijuana use carries real health risks, and it is vital to address it with the same seriousness as alcohol and tobacco.