ohhhhh there's an active metabolite. Okay, it makes a bit more sense now.

Thanks for the journal article link, that is precisely the type of source I'm looking for. So tl;dr it seems that if your metabolism is normal and you're on 300+mg/day of immediate release, the curve is pretty smooth.

I'm on 150mg/day but I'm a CYP2D6 poor metabolizer... so I probably could just take it all at bedtime, its half-life is going to be longer for me anyway.

Thanks!!