Can cannabis treat ADHD?

“We have to listen to our patients,” Dr. Kirsten Muller-Vahl repeats several times. It was hearing her patients with Tourette’s, ADHD and other neurological conditions tell her how they got relief by self-medicating with cannabis, after all, that drove her to become one of the world’s premier cannabinoid researchers.But that type of anecdotal evidence isn’t enough. “In the end you always need controlled trials because otherwise you cannot differentiate between pharmacological effects and plac...