I'm assuming when you say "half a pill" you're talking about the 100 mg dose ?

What and when you eat prior to taking the dose will have a lot to do with it's effectiveness.  If you have a meal high in fat prior to taking it (say within 2 hours of the dose), the effects can take longer or can be minimal, at best. I find that not eating at least 2 hours prior to taking a dose works well for me--and I make sure anything I eat about 2 hours prior to that period (4 hours before the dose) is low in fat.

--- On Mon, 3/2/09, go_rob_go <go_rob_go@...> wrote: