I take 4, 5 or 6 15-mg Oxycontin pills per day. (Some days, I just don't keep track but I know it's at least 4 per day.) I used to split the pills and take about 10-12 mg. per dose....then lately I started taking the whole 15 mg. at once because the lower dose didn't get me the high I was seeking.
What I'm doing to taper (and this is completely unscientific) is to take .5 pill every two hours -- that's 7.5 mg. (First dose 11 AM and last dose around 1 AM.) Then, in a few days, I drag out the time to 2 hr. 15 mins. then 2 hr. 30 mins. Then, I cut one of the doses down to .25 pill (3.75 mg) and make the doses closer together for a few days; then I cut two of the doses down to .25 pill. With this close dosing schedule, I don't give myself enough time to go through withdrawals. My reduction has been no more than 7%. I haven't projected out any further than a few days, because it might be discouraging to see how long it will take to get completely off them. And if I'm discouraged, I might give up. So, I'll just continue the way I'm doing it. I am determined to see it through this time, because I feel I have no other choice. I am sick to death of my life revolving around pills.
Hope that helps....