Nov 30, 2012 7:00 AM by Diana Kohnle
(HealthDay News) -- Caffeine can provide a little "pick-me-up" if you're struggling to stay awake. But this common stimulant, found primarily in many coffees and teas, also can cause a number of unwanted side effects.
In addition to the jitters, the National Sleep Foundation mentions these potential side effects of caffeine:
4 hours ago