I took 2 pills for the initial dose. After 45 minutes, I did not feel anything, so I took 3 more. 30 minutes later, still no affect on me whatsoever. So I said, 'What the hell?' and took the remaining 5. I eventually started to feel real shaky, and this lasted all night long, to the extent were I could not sleep at all. The shakiness that I felt was about the equivalance of a couple of diet pills that contain ephedrine. I felt extremely nauseous, but since the herbal E wasn't doing anything, I had also began to drink, so I'm not sure if it was the herbal E, alcohol, or the combination of the 2 that made me feel queasy. I paid $25 for 10 pills that only resulted in shakiness, insomnia, and nausea. In other words, if it seems to good to be true, then it is.