The Midol I use does not have caffeine... it says caffeine free right on the front of the package and its the formula for PMS... I couldn't make it thru a cycle without it.... I cramp and hurt terribly.... I have been on Atkins for 5 weeks tomorrow and so far the only difference for the better I have noticed is that I am mentally good this month... not grumpy... but all the physical signs are still still like cramps and water weight gain....I have went up 2 pounds and even though I know its just water weight it is still a big downer...plus my appetite some months really gets near impossible to control... like this month... the past 2 days is the first nuts I have eaten on this WOE ... I had peanuts and pecans and I think I had a little more than I should have.