Below, learn more about the first time Paul McCartney took the hallucinogen and how it affected his relationship with John Lennon.

Researchers made small tweaks to the molecular structure of LSD to see if it could be turned into an effective brain-healing treatment.

The Army pilot believes LSD is a sacrament “necessary for his continued spiritual growth and development," his lawyers argued.

Josh heard all the buzz about Silicon Valley coders and young entrepreneurs who took tiny doses of LSD to boost productivity and spark creativity. But the 32-year-old was drawn to the psychedelic ...

Researchers have developed a new, neuroplasticity-promoting drug closely related to LSD that harnesses the psychedelic's therapeutic power with reduced hallucinogenic potential.

University of California, Davis researchers have developed a new, neuroplasticity-promoting drug closely related to LSD that harnesses the psychedelic's therapeutic power with reduced ...

People who took twice-weekly low doses of LSD experienced no greater improvement in their ADHD symptoms than people taking placebo.

While microdosing LSD is being cautiously explored for therapeutic benefit again, it’s probably not going to help with your ADHD.

Musical artist and actor Rick Springfield has been open about his depression. Now he’s being equally forthcoming about how he’s dealing with it.

Rick Springfield is getting candid about experimenting with drugs as treatment for depression. In this week's issue of PEOPLE, on newsstands Friday, the "Jessie's Girl" singer, 75, shares that he ...

Bill Gates opened up about his past drug use in his memoir, "Source Code: My Beginnings." Gates said he tried LSD as a young man despite what Steve Jobs may have thought years ago. During his ...