When I drink caffeine, I got really upset stomach, end up with diarrhea, racing thoughts, loops, frequently inability to concentrate on the come down. I have a

When I drink caffeine, I got really upset stomach, end up with diarrhea, racing thoughts, loops, frequently inability to concentrate on the come down. I have a 250g bag of anhydrous caffeine powder. I always take some out with me in a plastic tube. If I can recommend something, it is not to swallow it. It quickly absorbs from the mouth and I perceive it to be much cleaner experience. Also, the duration is much shorter which makes it ideal to wake yourself up for the long way back home at night, but still does not prevent you falling asleep in an hour or so.