"If you injected 2 mg it would kill you instantly"
No it wouldn't. If you're going to spout off disinformation, at least put a disclaimer that these are your own personal theories, not facts as you imply in your post. I used to inject up to 16 mg of buprenorphine a day, quite often 1 1/2 pills (12 mg) at a time. The MOST that would happen would be a tiny, really more like insignificant, rush; and this was while taking (4) to (6) 10 mg Valiums at once. After MONTHS of struggling to try and stop shooting, I finally got off and after 3 months I am finally down to 1 mg sublingually (thank God). I am also completely off the Valium - another life-sucker.
What Bupe will do when you inject it is cause scarring, scar tissue, and lumps and bumps under the skin. No other opiate I've ever done (and I've probably injected them all) has ever caused these types of side effects EVERY time you inject it.
Buprenorphine has destroyed my testosterone levels as proven by blood tests, has made me completely unmotivated even WITH testosterone replacement therapy (I lost my business that was grossing $1,000,000+ per year), has caused me to become withdrawn and develop anxiety disorders, along with fairly severe depression. This is not a drug to take lightly AT ALL - this is some seriously powerful stuff that alters the levels of hormones and chemicals in the brain and body for MONTHS after cessation. This is my second time on it, and the last time I tapered off the only way I could quit was by tapering down to actually LICKING a pill 3 times/day, then eventually 2 times/day, etc. until I was off. I've also previously been on Methadone for probably close to a year, maybe a bit longer. I went from 180 mg to 0 mg in that period, and the taper seemed much easier in comparison, and the protracted withdrawal (Post-Acute Withdrawal Syndrome) seemed literally to be only 10% of what buprenorphine's protracted withdrawal is in both severity and length.
I usually never post but had to jump in after seeing quite a bit of disinformation posted along with people looking for suggestions on whether to start taking suboxone/subutex/buprenorphine/methadone.
Bottom Line here, and this is my opinion after 6 years switching between both, doing a total of 3 tapers on both and being clean for about 1 year off of each is that:
BUPRENORPHINE seems to be about 3x harder on the brain, and causes symptoms for much longer; i.e. Depression (sometimes so bad you don't want to get out of bed), almost completely dulled emotions (dysphoria), anxiety (caused by Post Acute Withdrawal Syndrome aka PAWS) and other side effects mentioned, but I'd say that the physical aspect of any PAWS or side effects during the taper is better than methadone. I will say that perhaps some of these are amplified a bit by the fact that I'm no longer taking Valium (Diazepam), but not by much because I've tapered before off bupe and felt these previously just as strongly.
The upside if I had to pinpoint (no pun intended) one would be that you do feel and function more normal on it for about the first 4-6 months. After that is when you really start feeling the side effects I mentioned.
METHADONE based on my experience was very easy to taper off of, and when I jumped, I jumped from .5 mg and felt NO withdrawal. With Buprenorphine, the stuff is SO strong that you literally have to get down to .10 mg - yes, you heard me right, 1/10th of 1 mg in order to jump and not be in withdrawal (see liquid taper method). If I had to do it all over again, I'd honestly stick with Methadone, especially if I could get it prescribed vs. going to a clinic every day, which IMO, is the biggest downside.
You do not know what you are talking about. I have been on suboxone and only suboxone for 8 years. I have tried getting off it many times cold turkey tapering and to me the withdrawals I have experienced are very similar to methadone. You are using ultram that is why they are not that bad and everyone is different.
Subvoxin is more addictive than heroin has a longer half life feel bad for 1-2 months after last dose heroin is 5-10 days depending on severity of use..