I've been wondering about absorption of oral drugs and their "therapetic" levels in the body/brain with regards to daily dosages. (I am particularly interested in SSRIs, if that makes any difference.) (I realize there are many factors that influence this. I'd like to get an idea of the ideal situation.) 1] For a daily dose, what would the blood/brain levels of the drug look like over the course of a day? Is it a bell curve? Is it skewed (fast rise, slow decline)? 2] If the patient missed a daily dose, but took a half dose later in the day, would the curve of that half-dose be the same shape but half the height? Or would it rise at the same rate but cut off sooner? I suppose my goal is to figure out how one might take a late-yet-smaller does so as to maintain a consistent level. My questions could probably be simply answered by reference to some good graphs.