LED, I just want to say the obvious, because it once wasn't so obvious to me and I think it bears saying in case this reaches someone else, who can hear their own situation in my words: caffeine gum is okay, but relying on it when driving is Bad. I bought some basically to stay alert, and had it in my car when I was coming down from Mt Rainier. I have a habit of leaving for the mountain pre-dawm, and driving home I can get really tired. After driving for 45 minutes and descending a couple thousand feet, I could almost be asleep at the wheel, and not know it or admit it to myself. I could catch myself beginning to doze, but still not stop or slow the car. There's not alot of oncoming traffic on Hwy 410, so frankly I think I got away with some bad driving for several seasons. I would pop a piece of caffeine gum, thinking it would make a difference. It didn't. Long story short, I didn't kill myself or anyone else, but I might have, and I have learned that pulling over for a 20-30 minute nap refeshes me way, way better than caffeine gum ever could. Caffeine gum isn't addictive, except in the sense that you can fool yourself into thinking you are more alert than you really are. Maybe its my 47 year old body, but a short nap does way better than the gum.