We have used Up Your Gas Energy Blaster many times over the years to assist us in driving straight through for 12-14 hours. It is amazing. Once taken, it kicked in in about 30 minutes and we were able to drive the entire distance without any feelings of being drowsy or sleepy. I've tried other energy products, including one of the newest on the market, the 5 Hour Energy. Nothing compares to the alertness and consistent energized effect I've experienced with Up Your Gas. I struggle with insomnia and driving long distances creates serious drowsiness problems for me. The first time I used it, I decided that I will never drive to anything further than an hour away without taking it first. It's that good. The new formula isn't quite as helpful as the old one was, but I take a Sudafed (for my constantly stuffy nose) along with the Up Your Gas and it's almost like it used to be. As far as I am concerned, nothing compares with this product.