A moderate amount of caffeine is fine for me. However, if I have more than 3 strong coffees within 5 hours or so I get a bit jittery. As a student I did several 16 hour-long experiments overnight, where I was counting cells under a microscope for 15 minutes each hour. I kept myself awake with caffeine tablets. After the finish of each experiment I had mild hallucinations for about 30 minutes, but whether this was the caffeine, lack of sleep, or looking down a microscope for such a long time I could not say.
A moderate amount of caffeine is fine for me. However, if I have more than 3 strong coffees within 5 hours or so I get a bit jittery. As a student I did several 16 hour-long experiments overnight, where I was counting cells under a microscope for 15 minutes each hour. I kept myself awake with caffeine tablets. After the finish of each experiment I had mild hallucinations for about 30 minutes, but whether this was the caffeine, lack of sleep, or looking down a microscope for such a long time I could not say.
