Eminem has always been candid about his addiction to prescription drugs. In GQ's upcoming 'Gods of Rock' issue, the Detroit rapper goes into great detail of his five-year battle with drugs and how his life spiraled out of control.

By his own admission, Em claims to have popped 60 to 90 pills a day that included a concoction of Vicodin, Ambien, Valium and Seroquel (used to treat schizophrenia). Unfortunately, he suffered some memory loss and still can’t recall many important events from his career. "Ambien ate a hole through my brain," he tells GQ Senior Editor Will Welch.

The road to recovery was also a major challenge for Eminem. His first experiences in rehab wasn't so pleasurable. "Everyone was staring at me," he told GQ.  "I could never be comfortable. They [were] stealing my hats, my books -- it was chaos. And at the time, I didn't really want to get clean. Everybody else wanted me to. And anyone will tell you: If you're not ready, nothing is going to change you. Love, nothing."

Frustrated and depressed, he left rehab and still continue using drugs. Then he relapsed and was admitted to a hospital. "I came to in the hospital and I didn't know what the f--- happened," Em recalls. "Tubes in me and s---, f---in' needles in my arms. I didn't realize I had [overdosed]. I think I was clean for two weeks. I was trying so hard -- I was trying to do it for my kids -- but I just wasn't ready."

Ultimately, it was death that made Em want to kick his drug habit. "I had a feeling in my arm that was weird, man," he says. "Like, it really freaked me out. So I went to some people I trust and said, 'Look, I know I need help. I'm ready now.' I got a room in the same hospital where I overdosed, and I detoxed."

After receiving lukewarm reviews on both 'Relapse' and 'Recovery,' despite them being his biggest-selling albums, Eminem feels that he has a lot to prove to his fans. "On an emotional level, I want my music to connect with the same kid who I was," he says. "So it was like, 'Okay, let me get serious. Because I feel like I'm being [written] off right now, and I'm kind of on my last leg.' I felt like the underdog again."

GQ’s 'Gods of Rock' issue hits newsstands on Oct. 25.