Marshall Mathers opens up about his drug addiction in a new documentary How to Make Money Selling Drugs. Mathers, aka Eminem, discusses his scary drug abuse, revealing that he almost died during one overdose. But the message of the documentary is that people can fight drug addiction and bounce back stronger.

Mathers drug addiction became so intense that he checked himself into rehab in 2005. Now, in the new documentary, the 40-year-old reveals that his prescription drug abuse nearly killed him.

Marshal has admitted in the past to taking 10 to 20 Vicodin pills per day. "Valium, Ambien, the numbers got so high I don't even know what I'm taking," he told Vibe magazine after his rehab stint.

 "My bottom was going to be death," he says in the film excerpt on YouTube.

Recalling the first time he had Vicodin, he explained it was a "feeling of 'Ahhh,' everything was not only mellow, but didn't feel any pain. It just kind of numbed things."

Eminem said that it was hard for him to realize that he had a problem since he wasn't abusing drugs like crack or heroin.

"I don't know what point exactly it started to be a problem, I just remember liking it more and more," he explained.  

He reveals his scary brush with death when he was hospitalized following an overdose.

"Had I got to the hospital about two hours later, I would have died," he said. "My organs were shutting down. My liver, kidneys, everything. They were gonna have to put me on dialysis, they didn't think I was gonna make it."

Once leaving the hospital, Eminem says that he didn't sleep for three weeks and relapsed a month later. "I remember just walking around my house and thinking every single day, like, I'm gonna fucking die. I'm looking at my kids, and like, I need to be here for this."

"It's been a learning process," he said. "I'm growing. I just couldn't believe that anybody could be naturally happy or naturally function or be just enjoying life in general without being on something."

He added, "So I would say to anybody, 'It does get better, you know. It just does.'"

The film, which opened on June 29, also features interviews with Russell Simmons and Woody Harrelson.