CHICAGO: Philip Seymour Hoffman has been in rehab for heroin abuse. The Oscar-winning star - who battled alcoholism as a young man - has admitted he spent ten days in a detox facility earlier this month after he began taking the illegal drug. He revealed that he fell off the wagon a year ago, after 23 years of staying clean, when he became addicted to prescription pills. And he said the problem escalated to snorting heroin, before he realised he needed help. The 45-year-old actor says his heroin use only lasted a week before he checked himself in to rehab.–TS