Anywhere between 3-5 days.

What the fuck? You just were on methadone to cure a heroin addiction and now you are going back, or at least to some other opiate, and asking advice about how to go back?

I wish I could help you man. In switzerland there's FREE heroin to heroin addicts. It would make such a huge difference in the rest of the civilized world.

From wikipedia:

>Methadone has a typical elimination half-life of 15 to 60 hours with a mean of around 22. However, metabolism rates vary greatly between individuals, up to a factor of 100,[46][47] ranging from as few as 4 hours to as many as 130 hours,[48] or even 190 hours.[49] This variability is apparently due to genetic variability in the production of the associated enzymes CYP3A4, CYP2B6 and CYP2D6.