Caffeine impacts everything from sleep quality to concentration and heart rate. Learn how long withdrawal takes, the diuretic effects on the body, and the potential risks of taking caffeine tablets with medication or alcohol.
Because caffeine is a powerful psychoactive drug, it can cause some unpleasant side effects, including sleep disturbances. Caffeine directly stimulates brain activity, even during sleep, which can lead to nightmares. It can also cause or worsen nightmares indirectly through its effects on the quality of your sleep.
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Caffeine influences your digestive system in multiple ways. It serves as a diuretic, it quickens the digestive process and it stimulates your colon. The effect of these mechanisms varies based on other physical factors; depending on your situation, caffeine can actually cause, relieve, worsen or prevent constipation.
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