Annie,

I'm totally guessing, trying to figure this out myself--but could the reason for the up-and-down doses have to do with the half-life of the drug? Tell me if I have this right: if you take 60 mg. at 8:00, then at 12:00, you still have 30 mg. in your system. So if you take another 60 mg. pill at 12:00, you now have 90 mg. in your system.

This is where I get lost. I tried to make a line graph so I could figure out how to keep the amount in my blood fairly even. But I don't know if the efficacy declines steadily, or, um, exponentially? Asymptotically? I don't think I ever got that far in calculus...help?