Will Smith, Megan Fox are praising psychedelics. What medical experts want you to know.

Ever heard of magic mushrooms? Or smoking a toad's venom? What about ayahuasca? 

Psychedelics drugs have long been popularized by celebrities, and most recently a few big names spoke out about their experiences: Will Smith credited an ayahuasca trip in Peru to helping him find happiness, calling it "the unparalleled greatest feeling I've ever had," while former NBA athlete Lamar Odom is set to share his own experience with psychedelics as a headliner to a health, wellness and business event about psychedelics, Meet Delic.

Earlier this year, HGTV star Christina Haack claimed the hallucinogenic properties of a toad's venom reset her brain and "kicked out years of anxiety," and Megan Fox said psychedelic tea helped her in a way that "talk therapy or hypnotherapy" couldn't.