I was making a long 10 hour drive to visit my son, and 3 hours into my drive I got very very sleepy. I stopped at a station, tilted the seat back and rested for awhile. Then I called my son and told him I did not know how long it would take me to get there because I might have to stop several times and rest. He told me to go into the store and get a shot of 5 hour Energy. Then he said to drink it, then stretch out for 15 more minutes. He said I would be good to go for the rest of the day. And that is exactly what happened. I keep 5 Hour Energy on hand now for certain occasions when I need a serious energy boost. I keep 2 in my purse at all times. It worked great!!