We were traveling to Texas for the eWomen Network Conference last year. It was a wonderful but trying trip. I was getting so tired that it was almost dangerous for me to drive. So I pulled into a gas station for gas, and despite my skepticism I bought a 5-hour ENERGY®, opened it, and drank it down. To my surprise it tasted quite pleasant. It was amazing how fast it started working and lasted longer than five hours. I experienced no problem whatsoever. Now every time I drive somewhere I make sure that I have 5-hour ENERGY® with me. It is a wonderful product and there are no unpleasant after effects. Great stuff.