OP: Yes. I have been taking anywhere from 2mg a day to 8mg a day of subutex for over 5 years.. I can honestly say, not trying to scare you, but... the WD from oxy, would've been easier to endure, than the WDs subutex will give! I can't lie, bupe has some of the worst WDs I have ever gone through, next to benzos.. Way worse than oxy, even at 300mg a day doses of oxy.. I used to use anywhere from 300-500mg a day of oxy, or an equal amount of another potent full agonist opioid/opiate... and none of them(the WDs), even at stupid high doses like that compared to the WDs I got from bupe. Bupe has such a long half-life and duration of action(depending on the ROA you take it, but sublingual, it has a very long duration of action.. IV has the shortest, and shortest half-life.. every other ROA in between like sniffing or plugging, is somewhere in between the other two, as far as both half-life and duration of action go.)
No matter what ROA you use, the WDs do last quite a while... and are very hard to cope with, without wanting to use any kind of opioid to get you well again.. just like oxy WD, but its just worse.. don't know how to explain it.. it just is! I tried jumping off of them at 2mg doses or less, a few times in the past... it always ended up with me getting like 2-5 days into WD, and saying fuck this.. I cant take it anymore.. then relapsing on any given full agonist.. or just hopping back on bupe. Again and again.. until finally just staying on 8mg of bupe, for the past 16 months now... no full agonists, just stuck on bupe.. IVing it no less, which makes me a full blown bupe addict you could say.. never thought I would be, as I hated bupe initially getting on it.. now I love the feeling, and cant make myself, not want it... it sucks.
So.. all you can really do is get some good comfort meds to help if you do decide to just jump off,( I would try a taper though first!) which still weren't enough to help me get off bupe. Loperamide, Valium or other long acting benzos at lower doses(if only temporarily, don't get addicted to benzos, that sucks even worse!), THC of any kind such as weed, hash, hash oil, etc., and OTC sleep aids like sleepinal(diphenhydramine capsules 50mg), melatonin, etc. all help with lots of other people jumping off bupe/opiates/opioids... they just couldn't stop my hunger for opioid related drugs, even though loperamide is one itself actually so be careful with that too.. it can be addicting, even though it produced absolutely no feeling at all, just feeling better than full blown WDs..
Best of luck to you.. hope you can get off those little shits.. don't know when or if I ever truly will, without getting back on oxy or dope!