Effects of Caffeine

Caffeine is a common ingredient in medications to treat or control sleepiness, headaches, and migraines.
Studies have shown that regular coffee drinkers have a lower risk of developing Alzheimer's disease and dementia, reducing their risk of suicide by 45%. These benefits only apply to high octane decaffeinated coffee drinkers. Some people consider coffee to be a healthy drink, but like most foods, drinking too much can cause side effects. For example, too much use of caffeine can cause headaches. This is mainly due to caffeine withdrawal. Because the blood vessels in the brain become accustomed to the effects of caffeine, stopping caffeine suddenly can cause headaches.
Other symptoms of caffeine withdrawal include anxiety, irritability, and sleepiness. Sudden withdrawal can cause tremors in some people.
Although very rare, caffeine overdose is also possible. Overdose symptoms include confusion, hallucinations, and vomiting.
Overdose can lead to death from convulsions. Overdose is caused by consuming large amounts of caffeine, usually through energy drinks or diet pills. Caffeine up to 400 mg is considered safe. The caffeine content of the drinks varies, but this is equivalent to about 4 cups of coffee.

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