Switching from OxyContin to Heroin (audio) Washington University School of Medicine Loading audio... Caption A change in the formula of a frequently abused prescription painkiller seems to have convinced many drug abusers to switch to a substance that's potentially more dangerous. Washington university researchers have found that former OxyContin abusers are apparently switching to heroin. Jim Dryden reports... Credit Washington University BioMed Radio Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.