Occasional Male Cannabis Users Feel Stronger Effects

A UCLA controlled trial found men who use cannabis occasionally reported more high, sedation, and impairment than other participants.

Updated on Nov. 6, 2026 in Men’s Health

Isometric editorial illustration of a cannabis leaf cut into uneven stacked geometric segments on a plain matte surface, one segment darker than the rest. — A UCLA randomized controlled trial found occasional male cannabis users reported stronger high, sedation, and impairment than other participants. AI Illustration. Upload story photo >

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A randomized controlled trial led at UCLA found that men who used cannabis occasionally reported feeling more high, sedated, and impaired than other participants, while frequent users of both genders responded to cannabis in similar ways. The study was published in Neuropsychopharmacology and is relevant to adults who use cannabis across the United States.

Why it matters

Much of what scientists previously understood about gender differences in cannabis effects came from animal research and from human studies that pooled data across different trials. This study was designed to examine gender and frequency of use together while controlling for hormones, which helps clarify who may experience stronger effects and why.

This randomized controlled trial tested smoked cannabis in participants who did not know which product they received across three sessions. Blood THC levels did not account for the differences in reported effects between groups.

The players

University of California, Los Angeles (UCLA)

A public research university whose researchers conduct extensive work on substance use, addiction, and behavioral health.

The details

Participants smoked placebo, lower-THC, and higher-THC cannabis in three separate sessions without knowing which they had received. Women in the study were not using hormonal birth control and were tested during the same phase of their menstrual cycle, which helped isolate gender and frequency of use from hormonal influences. Men who used cannabis occasionally were also the only group whose heart rate rose significantly after smoking active cannabis, and they reported more unpleasant effects, including anxiety.

2026: Study published in Neuropsychopharmacology

Health Landscape

Prior understanding of gender differences in cannabis effects relied heavily on animal studies and on human research that pooled data from separate trials. This controlled design offers more direct human evidence on how sex and frequency of use interact.

If you are a man who uses cannabis occasionally, this research suggests you may feel more intense effects, sedation, or anxiety than frequent users, so it is worth discussing your use with your doctor. Frequent users of both genders showed similar responses, so pattern of use may matter as much as gender.

The takeaway

Gender and how often you use cannabis both appear to shape how strongly you feel its effects, and blood THC levels alone do not explain the differences. If you use cannabis, consider raising your pattern of use and any unpleasant effects with your physician.