NO METHADONE, OF COURSE YOU WILL GET ANXIETY, YOU CAN MEDICATIONS THAT ARE NOT ADDICTIVE! Also for us dope fiends we will always find a reason to use...anything!! Just have to deal with the anxiety. COld Turkey detox, it sucks I know, but once through it more likely not to go back. Good Luck

I've never heard of any link between Heroin use and Anxiety disorder but there's very little formal study on Heroin outside of addiciton recovery. Certainly if you have a propensity for anxiety disorders stress can aggrivate your condition. All drug use puts stress on the brain and detox is extremely stressful for Heroin users, so it's certainly withint the realm of reason. Methadone has its own array of problems in addition to being an aggrivator for anxiety disorders. If he's out of recovery treatment and still having issues have him get in contact with a psychiatrist, evaluate if the Methadone is causing his problems and rework his treatment as needed.