It depends on the person. How many are they 25 or 30/mg? I usually take 1 (25mg) in the moring with 200mg caffine and 1 generic asprin and then 2 before lunch (and workout it gets me pumped) and then 1 around 5pm with 200mg caffine and 1 generic asprin(ECA). It works great for me but The mod wiil know best.