Cups of coffee with marijuana and roasted beans on a table
Some research has shown that caffeine can amplify the short-term forgetfulness caused by THC. But a new study in the European Journal of Neuroscience indicates that the caffeine may block other effect of cannabinoids. In a rat model of attention deficit hyperactivity disorder (ADHD), Brazilian and... Read more

Featured Articles

Green cannabis leaf in soft focus on an sunset-colored background.
Project CBD releases the results of one of the most extensive CBD user surveys to date.
Side view of active sporty young running woman. She is wearing pink gym shoes and black leggings and a black tank top.
Having a bad hair day? Take a shot of CBD rum and try some CBD shampoo.
woman in red pants trying not to pee
Promising Research for Overactive Bladder Syndrome
Read Project CBD's special report commenting on cannabis science to the FDA.
In this edition of Cannabis Conversations, Project CBD director Martin A. Lee speaks with Dr. Paula Dall'Stella, a leading cannabis clinician in Brazil.

Essential reading

Cannabidiol—CBD—is a cannabis compound that has significant medical benefits, but does not make people feel “stoned."
Project CBD has created a beginner’s guide for cannabidiol & cannabis therapeutics to address key questions of CBD users.
Medical cannabis research shows that CBD may be therapeutic for many conditions.
With the growing awareness of CBD as a potential health aid there's also been a proliferation of misconceptions. Find questions and responses to common misinformation.
High dose? Low dose? CBD? THC? Optimizing one's therapeutic use of cannabis may take some experimentation.

Smoke Signals: The Book

Image of the book Smoke Signals

Smoke Signals: A Social History of Marijuana

Get the book by Project CBD director Martin A Lee

  • Winner of the American Botanical Council’s James A. Duke Excellence in Botanical Literature Award
  • “Every American should read this landmark book!” — Douglas Brinkley
Get the book

Upcoming events

Map of upcoming events
Santa Rosa , California , United States
Sep 19, 2019
Vashon Island , Washington , United States
Sep 19, 2019
Pasadena , California , United States
Sep 23, 2019 to Sep 24, 2019