8. Sudden Fatigue
Caffeine is powerful enough to provide a big boost to energy levels and clear the cobwebs from the brain, but it also can result in a sudden crash, especially for individuals who are dehydrated or not well-rested. Sudden fatigue from excess caffeine can be especially dangerous when on the road. Choosing to "rebound" the fatigue can lead to insomnia and poor sleep -- to avoid this cycle, reduce the amount of caffeine consumed at one time.
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