Hi, welcome. You want to take methadone as a taper for heroin? We don't give tapering advice, but that won't work anyway. Your last sentence: I did it before, I can do it again is the issue. You've been to treatment, didn't they tell you about aftercare? We always say, anyone can get clean, it's the work to STAY clean. If you get off the stuff this time, what will you do differently to keep from repeating this cycle? All those that work a program of recovery stay clean. Those who don't end up repeatedly relapsing until the bitter end.