Correct. Its called the ceiling effect. After 8 mgs or so, the opiate recepters are saturated and therfore unable to process any more of bup. in terms of a high. Getting off of this stuff is some of the hardest opiate to extridite yourself form. Anyone who says no w/ds is a quack. fortunately ppl are now understanding the mind/social control of this opiate. And with a half life of apprx 37 hours and dosing every 24 hrs, the half lives keep building making it virtually impossible, and even after a short period on, to get off. Never take sub until you are in a state of mod. w/ds. The COW scale is helpful. And to avoid maximum discomfort a realistic taper is the only way off. The only appeal for this drug was the month take home VS. the everyday thing with 'done. And many ppl were tricked on to this drug. it was desihned for rapid detox and works well in that capacity. But now we're finding people on BMT as opposed to MMT. And waht "they" wanted. This drug is synthsized from the opium poppy as thebein not morphine. Taking this drug to soon or to late can result in percp/wds--a 5 day hell of throwing up, and general extreme discomfort. I've heard it described as the worst hangover you have had X10.If you feel you need maint. therapy, i would choose MMT over BMT anytime. Many forums out there that can describe the horrors far better than I. Be safe