I used to take this a few years ago. It was originally designed for Narcolepsy and for people with 'shift work sleep disorder'. I used to have to drive great distances and would get very drowsy and my doctor prescribed this for me. I liked it because unlike No-Doze and similar meds, it wakes you up and gives you a bit of energy, but you do not feel high nor do you have that shaky feeling you have with those meds. You take it and then a few minutes later, all of the sudden, you are just not sleepy anymore.

The only problem I had with it was my insurance company. They did not want to pay for it unless you had the diagnosis of Narcolepsy and it was VERY expensive. Fortunately, I worked for a doctor and I could get free samples. But like I said, this was several years ago and I understand things have changed in that regard.