Prince Rehab Doc History of Treating Rock Stars

5/7/2016 12:50 AM PDT

Prince's Rehab Doc Treated Gun N' Roses Drummer

EXCLUSIVE

The doctor commissioned to save Prince's life treated one of the most strung out rock stars in history.

Former Guns N' Roses drummer Steven Adler sought treatment from Dr. Howard Kornfeld in the mid-'90s to kick a vicious heroin habit. 

Adler's been open about his demons -- his heroin problem got him booted from Guns N' Roses. In 1996, right around the time he was being treated by Kornfeld, he suffered a stroke from an OD that left one side of his face paralyzed.

We're told Dr. Kornfeld treated Adler with the same synthetic opiate Kornfeld's son carried in his backpack to Prince's home.