Clinical trial Recruiting at 1 site Phase 1 Interventional Ages 18 to 55

Examining how THC affects men and women differently

Official title: Gender Related Differences in the Acute Effects of Delta-9-Tetrahydrocannabinol in Healthy Humans

Run by Yale University · NCT02781519 · Data updated 2026-11-12

This study tests how THC affects men and women differently to better understand its immediate effects on healthy individuals.

Quick facts

PhasePhase 1
Study typeInterventional
Ages18 Years to 55 Years
SexAll
Enrollment100 (estimated)
SponsorYale University
Academic / other
Locations1 site (West Haven, Connecticut)
StatusRecruiting
StartedJune 2015
Main results expectedJune 2026
Study endsDecember 2026
Registry record updatedJune 10, 2025
Trial IDNCT02781519 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are healthy individuals with at least one lifetime exposure to cannabis.

Probably not a fit

Patients who are cannabis naive or currently taking estrogen supplements or oral contraceptives may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study investigates the acute effects of delta-9-tetrahydrocannabinol (THC) on healthy individuals, focusing on gender-related differences. It aims to characterize how men and women respond to THC and to explore the underlying mechanisms of these differences. Participants will receive either THC or a placebo to assess the immediate effects of the substance. The study is designed to enhance understanding of cannabinoid effects across genders.

Why it matters

Potential benefit: If successful, this study could lead to more tailored cannabis treatments based on gender-specific responses.

How similar studies have gone: While studies on cannabinoids exist, this specific focus on gender differences is relatively novel and has not been extensively tested.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* at least one lifetime exposure to cannabis
* good physical and mental health

Exclusion Criteria:

* cannabis naive individuals
* major current or recent stressors
* taking estrogen supplements or oral contraceptive pills (for women)

Where it's running

  • Biological Studies Unit at the VA Connecticut Healthcare System, Yale School of Medicine
    West Haven, Connecticut, United States
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.