The lethal cocktail of drugs that killed actor Heath Ledger two weeks ago could be sitting in your medicine cabinet. The medications — identified Wednesday as oxycodone, hydrocodone, diazepam, alprazolam, temazepam and doxylamine — are the generic names for the painkillers OxyContin and Vicodin, the anti-anxiety drugs Valium and Xanax and the sleep aids Restoril and Unisom. Ellen Borakove, a spokeswoman for the New York City medical examiner, who conducted the autopsy, said Wednesday that the cumulative effects of these combined prescription medications killed the 28-year-old Australian-born actor. "The danger is that all these drugs have similar side effects and...