The 48-year-old drummer has a long history of battling alcoholism and substance abuse issues. He has appeared on reality TV shows Celebrity Rehab With Dr. Drew and Celebrity Rehab Presents Sober House following a 2008 arrest for heroin possession. Steven also wrote a book about his struggles, titled 'My Appetite for Destruction: Sex & Drugs & Guns n Roses'.

Adler's frontman, Jacob Bunton, says:

"We are truly sorry to all of the fans and promoters who were looking forward to seeing us on the road, but right now Steven's health is the most important thing."

He added that the band hopes to make it up to everyone when Steven recovers. Over forty dates are currently being rescheduled for early fall.