As a public service, I have provided a link to The
Ingestion: If swallowed, do not induce vomiting unless directed to do so by medical personnel. Never give anything by mouth to an unconscious person. Loosen tight clothing such as a collar, tie, belt or waistband. Get medical attention immediately.
Hogwash. I’m living proof that caffeine is mostly harmless. Mostly.
Although I can warn you that too much caffeine has adverse effects. For example, it can cause all of your bodily fluids to become flammable. This is a plus for camping and tailgating parties.
It can also result in your bodily fluids becoming corrosive, which is hell on your wardrobe and makes it difficult to donate blood. (Unless they use special equipment to extract/contain it.) But on the positive, it is a handy deterrent against ticks, leeches, mosquitoes, and many paranormal creatures.
See? Caffeine is good for so much more than just increased productivity!