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An overdose of caffeine will produce a condition known as caffeine intoxication or caffeine poisoning in which both physiological and psychological symptoms develop. These symptoms include:
diuresis
excitement
flushed face
gastrointestinal complaints
increased blood pressure
insomnia
muscle twitching
nervousness
paranoia
psychomotor agitation
rambling flow of thought and speech
rapid pulse
restlessness
tachycardia
vasoconstriction (resulting in cold hands and feet)
In severe cases delusions, hallucinations, depression, mania, disorientation, lapses in judgment, losses in social inhibition, and even absolute psychosis may result. |
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