Cannabis and Erectile Dysfunction: What the Evidence Actually Shows
Erectile dysfunction (ED) is not simply a sexual problem—it can be a sign of vascular disease, diabetes, hormone abnormalities, medication side effects, or psychological distress. Although cannabis is sometimes promoted as a way to improve sexual performance, current research does not establish cannabis as a treatment for ED.
A 2020 survey of men who visited a cannabis dispensary found that more frequent cannabis use was associated with higher scores on the International Index of Erectile Function, a validated measure of male sexual function. The study included more than 300 men, and participants who reported using cannabis more often also reported better overall sexual satisfaction and intercourse satisfaction.
Those findings are interesting, but they do not show that cannabis improves erections. The study was observational, relied on self-reported information, and recruited participants from a single dispensary. It did not randomly assign men to use cannabis, compare them with a nonuser control group, or determine whether cannabis caused the differences in sexual function. Factors such as age, general health, relationship status, stress, alcohol use, and other drug use could have influenced the results.
Other research has pointed in the opposite direction. A 2019 systematic review and meta-analysis of five case-control studies found a higher prevalence of ED among cannabis users than among controls. The pooled estimate suggested substantially higher odds of ED, but the studies were highly inconsistent, and the authors emphasized that longitudinal research was needed before drawing conclusions about causation.
More recent genetic research has added nuance. In a 2024 Mendelian-randomization analysis using data from the UK Biobank and FinnGen, researchers found no evidence that genetically predicted cannabis use or cannabis use disorder caused ED or changes in testosterone, follicle-stimulating hormone, luteinizing hormone, or estradiol levels. This type of analysis can help address some confounding problems, but it does not answer every question about dose, product strength, route of administration, or the effects of long-term use.
Why cannabis might affect sexual function
Cannabis compounds such as delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) interact with the body’s endocannabinoid system. Endocannabinoid receptors have been identified in tissues involved in sexual and reproductive function, including the brain, testes, and sperm. A review in Nature Reviews Urology concluded that the system appears to influence reproductive biology, but human evidence remains inconclusive.
Some people report that cannabis reduces anxiety, increases relaxation, heightens touch sensitivity, or makes orgasms feel more intense. Those subjective effects could improve sexual experiences for some individuals, particularly when stress or performance anxiety is contributing to sexual difficulties. They are not the same as treating the physiological causes of ED, however, and cannabis can also produce sedation, impaired judgment, anxiety, or difficulty maintaining focus.
What about sperm count and testosterone?
Claims that cannabis universally lowers sperm count or testosterone are not supported by a simple yes-or-no answer. Laboratory and animal studies have identified possible effects on hormone signaling, sperm movement, sperm shape, and reproductive tissues. Human studies, however, have produced mixed results and are often limited by differences in dose, frequency of use, tobacco exposure, other substances, and the health of the participants.
For that reason, men trying to conceive should discuss cannabis use with a clinician rather than assuming it is harmless or that stopping it will necessarily resolve fertility problems. Cannabis should not be presented as a proven way to improve sperm quality, sexual performance, or erections.
ED deserves a medical evaluation
The National Institute of Diabetes and Digestive and Kidney Diseases lists cardiovascular disease, atherosclerosis, high blood pressure, diabetes, chronic kidney disease, nerve disorders, hormone problems, certain medications, anxiety, depression, smoking, and heavy alcohol use among the potential contributors to ED. Because ED may precede the diagnosis of cardiovascular or metabolic disease, persistent symptoms should not be self-treated indefinitely.
Cannabis may change how some prescription medicines work. The FDA warns that CBD can interact with other drugs and may cause liver injury, sedation, or other adverse effects. Cannabis products also vary widely in their THC and CBD concentrations, and products sold through state-licensed markets are not automatically proven or approved treatments for ED.
In short, cannabis may alter sexual desire or subjective enjoyment for some people, but there is no reliable evidence that it treats erectile dysfunction. The research includes conflicting observational findings, substantial limitations, and no established cannabis-based ED therapy. Anyone experiencing ongoing difficulty getting or keeping an erection should speak with a healthcare professional about possible underlying causes and treatments with stronger evidence.
