When I take it, I break a 200mg caffeine pill in 1/2 or 1/3 and take it couple hours apart. Seems to work better that way for me. I try to operate on only 100mg and occasionally take the second 100mg (remaining of the halved pill).

Also I find that eating a good meal with fats before taking caffeine works better for me. Otherwise I feel sleepy after caffeine.

Also, for faster absorption, I put it under my tongue and let it dissolve. That’s the fastest way to see the effects.