Condition

THC clinical trials and research

• 6Clinical trials
• 2Countries

Newest THC clinical trials

All recruiting trials (6)

• THC Titration with High-Potency Cannabis Concentrates

  This study tests whether regular cannabis users can self-titrate the THC dose when vaping concentrates to feel the desired effects.

  Recruiting Centre for Addiction and Mental Health · Toronto, Ontario · NCT07105449

• fMRI pilot: how THC affects memory and learning in young to middle-aged adults

  This will see if a single dose of THC temporarily impairs memory and learning in young to middle-aged adults who use cannabis.

  Recruiting Phase 2 Yale University · Hartford, Connecticut · NCT06647524

• Investigating the effects of THC and d-limonene in healthy adults

  This study is testing if a compound called d-limonene can change how THC affects healthy adults when both are taken together in a pill form.

  Recruiting Phase 1 Johns Hopkins University · Baltimore, Maryland · NCT06378957

• Exploring how CBD affects THC's psychoactive effects

  This study is testing how different amounts of CBD can change the effects of THC when people inhale them together.

  Recruiting Phase 1/2 Centre hospitalier de l'Université de Montréal (CHUM) · Montreal, Quebec · NCT06099379

• How marijuana (THC) and tobacco interact when used together

  This test tries to see if combining marijuana (THC) and tobacco changes blood drug levels and how people feel and respond physically in adults who regularly use both.

  Recruiting Phase 2 University of California, San Francisco · San Francisco, California · NCT05999383

• Effects of cannabis on the microbiome and inflammation in HIV

  This study is testing how cannabis compounds THC and CBD affect gut health and inflammation in people living with HIV.

  Recruiting Phase 2 University of California, San Diego · San Diego, California · NCT05514899

Related topics

Quick answers

How many THC clinical trials are recruiting right now?

6, as of November 12, 2026. We update this list each time we refresh our data from ClinicalTrials.gov.

Where are these trials running?

In 2 countries. The most sites are in United States (4 trials), Canada (2 trials). Each study page lists its sites and which ones are recruiting.

What phases are they in?

Phase 2: 3, Phase 1: 1, Phase 1/2: 1. Trials with no phase listed are usually device, behavioural or observational studies.

How do I join one?

Open a study, check the "Is this trial a fit for you?" section, then contact the study team listed on the page. They will ask a few screening questions. Asking is free and does not commit you to anything. Talk it over with your doctor first.

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