I took two capsules in the morning and the only thing I noticed was at lunch time I was really hot and started sweating out of nowhere when I was just sitting there. I have been taking the original Stim X, usually one a day sometimes two a day, and I didn't notice any energy increase with the new formula. I was curious though, the instructions that came with the sample said to take two inthe morning and then take...what 3 or 4 more 6-8 hours later. I can't remember exactly what it said now. Anyway, is it not as strong as the original?