I only take half, I very rarely take a whole pill.
On most days I take 1/2. The only problem that I have is that I stay up to late and I get hungry. But self disipline keeps me from eating. I normally take my pill @ 6:45am. If around 2pm I get hungry I take another 1/2. But on those nights I take a sleeping pill.
I think there are a few girls here who are taking just a half of the pill. But if you dont think thats gonna work, go to your doc, and maybe he can give you a different dossage. You could try the half for a few days and see if it makes you feel any better.