To be the "acception of the rule" .... I was on 265mg-275mg of methadose (clinic and take homes) for over a year...then switched to suboxone, and finally just recently got off suboxone and am opiate clean (in "that" sense)... I was also on like 16mg of clonazepam at the time...I'm not advocating the use of anything or dosing higher on anything, I'm just proving that there's an acception to what most everyone is saying here...as I was on over a quarter gram of methadone a day (with RX'd benzos to the ubsurdity) and I didnt even ever nod...suboxone made me nod more, if ever.
I'm also the acception to the rule of detoxing...I detoxed in the hospital off methadone to suboxone in less than a week, and only on the first day/night i puked, and only twice....the first time was bad, but i got over it...the next 5 days or so I just was sweating and chilly/etc...but the saline drip helped a lot...sweating./etc...they NEVER gave me anything to help me sleep, since I was already on 16mg a day of clonazepam...they actuallly put me in benzo wd's at the same time while I detoxed off methadone, because the hospital WOULD NOT give me my daily prescribed, legit, legal dose of clonazepam...they gave me 8mg instead...and i've been at that even since...often just taking 4-6mg. Anyways, if you're considering methadone....if you want to save a lot of time and bullshit, go with suboxone.
And for anyone that wants to or does use methadone recreationally...."lol", better write your will before you OD and die from MASSIVE respiratory arrest. Then again, when I was on maintinence, i was able to take over half a gram of methadone on the weekends (from take homes/double dosing), and even do like 20mg of clonazepam, and i would still not nod that hard if at all. But when i got sober, I definately realized how much of a zombie I was....and OMFG did my sex drive come back like a rabbit into outter space-bunnies.