Jack Osbourne tried to commit suicide when his mother was diagnosed with cancer. The 23-year-old star struggled to cope when Sharon discovered she had colon cancer in 2002, and took a cocktail of prescription drugs including OxyContin and Valium.
He said: "I started getting suicidal. I was just doing loads of drugs and drinking. I was miserable."
Jack claims he started going off the rails when he was 13, but things became more serious during Easter 2003.
He told In Touch Weekly magazine: "I disappeared for the long weekend. When I came back, I knew I needed help. I was like, 'OK, I will do this.'"
Jack's father rocker Ozzy Osbourne - who has previously battled alcohol and drug addictions - eventually convinced his son to seek help.
Jack spent a period in Malibu's Visions Adolescent Treatment Center and claims it was the best decision he has ever made.
He said: "A year passed and then two and then three and now it's nearly six. I don't have a plan, I'm just going to keep doing what I've been doing and hopefully not drink. I don't ever want to come back to rehab again."
Jack's sister Kelly recently checked into an Oregon treatment facility to receive treatment for her addiction to painkillers.
The 24-year-old star - who previously received help for her problem in 2004 and 2005 - said recently: "I knew if I didn't get help, I would die. I'm getting a second chance at my career and I want to be present for it."
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