Does marijuana cause erectile dysfunction?

Marijuana is being legalized in countries all over the world, but that doesn't mean it's completely safe - it can cause erectile dysfunction.


Around the world, marijuana is likely the most widely-used illegal drug. As there are many varieties of marijuana, and marijuana is still illegal in most countries, there has been relatively little research into a wide range of potential side effects. Currently, little is known about marijuana use in relation to erectile dysfunction. However, there are several mechanisms by which marijuana use may contribute to erectile problems.


Reduced blood flow to the penis

The active ingredient in marijuana is THC. THC is a smooth-muscle relaxant. Smooth-muscle is found in the gut, artery walls, penis and various other places. The movements of smooth-muscle are not under our control. As THC relaxes the smooth-muscle in the artery walls, blood pressure and blood flow can be reduced. An erection occurs when the penis fills with blood, so if blood pressure is insufficient, erectile dysfunction may occur. Tobacco is also connected with reducing blood flow, so if marijuana is combined with tobacco, it may reduce blood pressure further.

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Reduced libido

Many people use marijuana for its relaxing effects. Strong feeling of relaxation may temporarily interfere with libido, preventing the user from getting an erection. More research is needed to confirm if this is the case, but many people do report marijuana having a negative effect on their sex drive.


Heightened dopamine levels

Marijuana artificially increases the levels of dopamine in the body. Dopamine is involved in sexual stimulation. After prolonged use, the body may become used to higher dopamine levels so that normal levels of dopamine may no longer be enough to initiate and maintain an erection.


Cannabinoid receptors in the penis

Cannabinoid receptors are found in the corpus cavernosum of the penis. During an erection, the corpus cavernosum is filled with blood. Evidence suggests that marijuana can interact with cannabinoid receptors in the penis, preventing the corpus cavernosum from properly filling with blood, and thereby causing erectile dysfunction.

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  1. Cannabis Support > Cannabis and sex 
  2. Independent Drug Monitoring Unit > Cardiovascular Effects of Cannabis 
  3. Talk to Frank > Cannabis Effects
  4. True Libido > Dopamine, Erectile Dysfunction and Libido 
  5. Sex Info Online > Sex and Marijuana 

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