Have been going to methadone clinic since moving to Arizona in March 2011. There have been a few months at two different times that I have stopped going, but other than that I’ve been going to the clinic the whole time since 2011 up until finally quitting the clinic again this last time a couple months ago. 
I’ve also tried suboxone (never under a drs supervision- got the pills from a friend and used them for a few days to try &amp; only use them while detoxing but ended up using again after only a month of being clean) 