Yes I still take it and have not lowered my dose since going on it. I've noticed that my mood on it is much higher than it was before I started doing the heroin (which I started in the first place because I was depressed and suicidal), leading me to believe that it has significant anti-depressant potential even in opiate-tolerant individuals. Also, there's some history in the literature of it being an effective anti-depressant[1]. I haven't lowered the dose or stopped it because I am afraid I will end up in the same situation as I was before and start using again.
Why not just taper down to the minimum dose where you still get sufficient antidepressant effects? Especially since psychoactive drugs are typically prescribed at levels way beyond what is actually necessary.
[1]http://en.wikipedia.org/wiki/Suboxone#Antidepressant_potenti...