Each set of colors has a different amount of horomones, in order to more accurately mimic a woman's monthly cycle. Thus, it is
imperative that you take them in order. If you lose one, (because those buggers are small!) do what I do: open up a different pack, and remove the specific pill that you're on. Save that pack as you "back-up" pack, and any time you lose a pill, or can't find one but swear you haven' taken it yet, you can use it. Technicaly, every white pill has the same amount, so if for some reason you just took all of the white pills in random order one week, then all the light blue pills in random order, then all the dark pills in random order... As long as you took the same color each seperate week you'd be fine. But that's silly, they're in a nice circle for you, so take them they way they're packaged!