The singer checked into a facility in Pasadena, California, last year, prompting speculation he had slipped from sobriety, 20 years after he kicked hard drugs. Tyler claimed he was checking into rehab on doctor’s orders because of a foot injury.

Aerosmith rocker Steven Tyler has now confessed that his dependency on pain relief medication and sleep medication was what sent him back into rehab.

He says, “To have your feet done, to have your leg done, you have to be on narcotics. You have to be on sleep aids at night. I don’t know about (bandmate) Joe (Perry), but I was off and running and I didn’t like the me that was me.”

This is not Steven Tyler’s first bout with rehab. In fact, it’s his fifth. He and fellow band member Joe Perry were often referred to as the Toxic Twins for their substance abuse issues, but since then Tyler has been outspoken in his efforts to stay clean.

Even Tyler’s daughter Mia has had substance abuse issues. When she was a teenager, Steven tricked her into rehab by telling her she was going to a California spa. At the time, Mia had been drinking heavily and taking many speed-laced diet pills.

In 2001, the Roxbury rehab center named a wing in his honor because of his support for Victory Programs, a Boston-based agency that helps people facing homelessness, addiction, and chronic illnesses.