• Tics: Limited. In a 2023 trial of 22 adults with severe Tourette syndrome, an oral THC/CBD oil (up to 20 mg of each daily) reduced tics.
• Related anxiety and obsessive-compulsive symptoms: Limited. Improved in the same trial.

Good to know: Some participants noticed slower thinking and memory lapses.

What to ask for: A balanced 1:1 THC:CBD oral oil, the product used in the trial.