I had caffeine in an IV before. I was going under for surgery, and the doctor asked are you a coffee drinker? I told him oh yes, I'm a huge coffee drinker. Whe

I had caffeine in an IV before. I was going under for surgery, and the doctor asked are you a coffee drinker? I told him oh yes, I'm a huge coffee drinker. When I woke up from the surgery, it was pretty weird. I was wide awake and alert very quickly. Never got a caffeine withdraw headache. It was awesome.