Caffeine. The problem with caffeine is it is now found and many drinks. It is found in sodas, in energy drinks, in candy bars, in health food stores, in coffee, in teas and herbal supplements, so the real ptroblem is how much caffeine you are consuming because of this you may experience intoxication such as anxiety and witdrawals eg depression.
Caffeine. Refer to diagram.
Stimulant. Caffeine is both a stimulant and a weak diuretic. Most people are unaffected with the doses of caffeine found in coffee, chocolate and sodas. However, caffeine may trigger underlying cardiac arrhythmia issues ie. Palpitations, svt, atrial fibrillation or ventricular arrhythmias. As a diuretic, it can cause dehydration.