Caffeine is a chemical found in coffee, tea, cola, guarana,mate, and other products. Caffeine is most commonly used to improve mental
alertness, but it has many other uses.
Caffeine is also available in prescription and
non-prescription medications. Caffeine is used to restore mental alertness or
wakefulness during fatigue or drowsiness. Caffeine is also found in some
headache and migraine medications, in certain dietary supplements used for
weight loss, and in many popular energy drinks.
Formula: C8H10N4O2
Onset of action: ~1 hour
Duration of
action: 3–4 hours
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