Caffeine powder side effects (Ⅰ)

When taken for a long time, large doses of caffeine are a drug that can cause "caffeine poisoning". Caffeine poisoning includes addiction and a range of physical and psychological side effects such as nervousness, irritability, anxiety, tremors, muscle twitching (hyperreflexia), insomnia, and palpitations (Most people take caffeine for its stimulant effects. Many students who stay up late to prepare for exams and those who work at night consume caffeine such as tea, coffee, or caffeinated pills. According to the strict definition of addiction, addiction is only a gradual increase in dosage. It is more appropriate to describe caffeine addiction. However, according to a commonly accepted definition, any chronic behavior that is difficult to get rid of is called an addiction, so it can also be called caffeine addiction.).

Because caffeine can increase stomach acidity, long-term high-dose consumption can also cause stomach ulcers, erosive esophagitis, and gastroesophageal reflux disease. However, because both regular coffee and decaffeinated coffee stimulate the lining of the stomach and increase gastric acid secretion, caffeine may not be the only ingredient that is causing this.

The four caffeine-induced mental disorders reviewed in the Diagnostic and Statistical Manual of Mental Disorders (4th Edition) include caffeine hyperexcitability, caffeine-related anxiety, caffeine-related sleep disorders, and other caffeine-related disorders.

A large excess of caffeine, usually over 250 mg (equivalent to 2-3 cups of brewed coffee), can overstimulate the central nervous system. Symptoms of over-excitability from caffeine include irritability, nervousness, restlessness, insomnia, redness, increased urine output, gastrointestinal upset, muscle twitching, poor thinking, palpitations or hyperactivity, and agitation.

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