Thanks a lot. Its all clear now. After searching and reading a lot about tapering, there is one useful conclusion. The best way to reduce the dose is not to cut more than 25%. After doing that stay at least a week on it before cutting down again. I managed to get to 4 mg and next week l'll go down to 3mg. If everything is good the week after that l will be at 2mg and that's the end of my journey. I am staying on it for life. Hopefully it'll work and I won't develop tolerance?

ps. Just one more question. When on 2mg, is it better to take it at once or 1+1?
I've been on suboxone 5 times. Well suboxone 4, and the buvidal injection once.
I've used this tapering schedule to taper of with zero side effects, except for the time I had to do it faster than the time written here.
You need to switch on to subutex first, which comes in 0.4mg doses if that's available where you live.
Start at 2mg.
Week one, drop to 1.6mg
Week two, 1.6mg and skip the last day of dosing.
Week three, 1.2mg
Week four, 1.2mg, skip the last day of dosing
Week 5, 0.8mg
Week 6, 0.8mg, skip the last day of dosing
Week 7 0.4mg
Week 8 0.4mg, skip the last day of dosing.
At this point you need a pill splitter, and if you are under supervised dosing make sure you do this at the point you get your takeaways. This will be the last takeaways you'll take and the last time you go in if you're on supervised dosing. If not, just do what you're doing with a pill splitter.
Week 9, 0.2mg alternative day dosing
Week 10, 0.1mg, alternative day dosing.
That is the end of the taper.
You can stretch out the weeks for this and do it slower if you need to, but that is the increments you want to reduce using.
By skipping the last day of dosing before dropping the dose I've noticed that it seems to trick your brain into accepting the new, lower dose of bupe as acceptable because you'll be in extremely mild withdrawal (I'm talking a runny nose maybe and for me I'd get a cough, but that's it).
Alternative day dosing reduces the overall level of the bupe in your system I think. It may not do anything, but I found it worked better when I did that.
The only time I've had an issue with this was doing it in 6 weeks instead of the 10, and even that wasn't awful. The first and last time I did it were literally painless, and my only noticeable symptoms were again, a runny nose and a cough. The other time was maybe a bit worse with some insomnia as I started on a higher dose.
YMMV, I think it could depend on what dose you start on and how long you have been on it, I always tried to stay on a low a dose as possible, but yeah. This has always worked for me.
Note: this is the actual tapering schedule they use in Australia for getting people off. Everyone does it at their own rate, they have a maximum of 12 weeks to do it. But most come off at 4mg. I just drop it lower.