My MD told me he could prescribe Fastin or Adipex-P or even Tenuate Dospan if it's still on the market. I'm wondering if Fastin is the same as Adipex-P or is it just 30 mg. and is it taken more than once a day? I prefer the time-released capsules and 37.5 mg. Anyway, I know they're both Phentermine, but just want to take the one that works best. I realize that's all relative, of course!