Effects of Excessive Caffeine Use

Caffeine alerts. It blocks adenosine, a tired-making brain chemical. It also triggers the release of adrenaline, the "fight-or-flight" hormone.


Caffeine may delay sleep onset. It may reduce sleep time, especially for the elderly.


Small to moderate doses of coffee can enhance gastrointestinal motility, but more can cause loose stools or GERD. Switching from coffee to tea may help.

Digestive Issues

This is a big dose of caffeine to ingest in a short time, especially for someone not used to it or sensitive to its effects. For rhabdomyolysis prevention,

Muscle Breakdown

Caffeine addicts who go without it for several hours may experience psychological or bodily withdrawal.


Caffeine raises blood pressure in high doses, before exercise, and in infrequent users. This impact may be transient, so be careful.

High BP

Caffeine can speed up your heartbeat. Young people who drank energy drinks with high caffeine levels developed atrial fibrillation.

Rapid Heart Rate

Caffeinated coffee, tea, and soda improve energy. After the caffeine wears off, they can cause rebound weariness.


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