My daughter (37) who is also a hard working mom stopped by a convenience store and bought two Stacker Capsules or Pills and washed them down with some coffee. She was supposed to work today. I'm guessing that she needed a pick me up on the way to work. The Stacker Energy pills made her deathly ill with chest pains, nausea and etc. She came home and my wife took her to the local ER. She is better but still feeling rotten. The ER doc sees a lot of reactions with this pill in the ER in the nearest city to us, Breaux Bridge, LA. He and other ER doctors would like to see them outlawed. They are hazardous to your health. Quite frankly, I was unfamiliar with this drug. If you need caffeine, do it the old fashioned way with a good cup of coffee.