I haven't tried it, and I've barely heard of it, but I recognize it from an alternative treatment for OCD. It apparently can help Tourette's symptoms, and it promotes the growth of serotonin. Possible drawbacks of taking this supplement include "Feelings of paranoia possible. Not enough known to suggest without caution." There are no known drug interactions. Please be aware this information is from OCD-Free.org, and I'm not claiming it to be accurate!