Well, I'm 31 and I am currently NW IV, heading to V/VI.
I'm fully functional but the sensation has deadened. It definitely has. 5 days is long for me and while before the urge was very strong, it wasn't there the same way lately. And like I said, the final moment wasn't all that "explosive" either.
I also feel amazed that 1 pill would show this kind of effect but now I think I'll stay off for a couple of weeks and see what happens. And then go back on for another week. If it's all in my head, that's the best way to find out, yeah?