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Caffeine's widespread appeal is due primarily to its mild psychostimulant properties, which increase alertness and cognitive arousal and diminish fatigue. [10] Caffeine also produces a wide range of other symptoms, including upregulation of the cardiovascular system, increased global cognitive processing, and improved physical functioning.
Caffeine dependence can cause a host of physiological effects if caffeine consumption is not maintained. Withdrawal symptoms may include headaches, fatigue, difficulty concentrating, lack of motivation, mood swings, nausea, insomnia, dizziness, cardiac issues, hypertension, anxiety, backaches, and joint pain; these can range in severity from mild to severe. [18]
Sleep deprivation is the second most common trigger of seizures. [15] In some cases, it has been responsible for the only seizure a person ever has. [41] However, the reason for which sleep deprivation can trigger a seizure is unknown. One possible thought is that the amount of sleep one gets affects the amount of electrical activity in one's ...
“Caffeine is a double-edged sword. For many people, it helps their headaches and migraine,” Cohen says. “But there are people for who caffeine can make all things worse. …
Caffeine-induced psychosis is a relatively rare phenomenon that can occur in otherwise healthy people. Overuse of caffeine may also worsen psychosis in people suffering from schizophrenia. [1] It is characterized by psychotic symptoms such as delusions, paranoia, and hallucinations.
Caffeine is the world's most widely consumed psychoactive drug. [20] [21] Unlike most other psychoactive substances, caffeine remains largely unregulated and legal in nearly all parts of the world. Caffeine is also an outlier as its use is seen as socially acceptable in most cultures with it even being encouraged.
Symptoms associated with high doses of caffeine include muscle twitching, rambling flow of thought and speech, tachycardia and cardiac arrhythmia, periods of inexhaustibility, and; psychomotor agitation, [1] anorexia (loss of appetite), seizures, death. The symptoms of caffeine intoxication are comparable to the symptoms of overdoses of other ...
In a press release, the FDA states "there is evidence that the combinations of caffeine and alcohol in these products pose a public health concern." They also state that concerns have been raised that caffeine can mask some of the sensory cues individuals might normally rely on to determine their level of intoxication.