CBD may alter cannabis tolerance in heavy users

NCT ID NCT07471347

First seen Mar 16, 2026 · Last updated May 13, 2026 · Updated 5 times

Summary

This study looks at whether cannabidiol (CBD) affects how much THC heavy cannabis users need to feel intoxicated. About 30 adults who use cannabis heavily will take a single dose of CBD or a placebo, then inhale THC from a vaporiser and decide when they've had enough. Researchers will measure how much THC they use, plus mood, thinking, and physical signs like heart rate. The goal is to better understand cannabis tolerance and CBD's role.

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Contacts and locations

Study contacts

  • Contact

    Phone: •••-•••-•••• Email: •••••@•••••

Locations

  • King's Clinical Research Facility

    London, United Kingdom

    Contact Phone: •••-•••-••••

Conditions

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