Michael Fanselow (IMAGE) University of California - Los Angeles Caption Senior author Michael Fanselow said the research suggests that chronic opioid use increases susceptibility to developing anxiety disorders. Credit Reed Hutchinson/UCLA Usage Restrictions None License Licensed content 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.