15 septembre 2009
Symptoms of caffeine intoxication
An earlier study found that the clearance rate of caffeine from blood plasma averaged 114
milliliters per minute in nicotine smokers and 64 milliliters per minute in non-smokers.
Symptoms of caffeine intoxication have been seen with as little as 100 milligrams of
caffeine daily, and may include restlessness, nervousness (anxiety), excitement, insomnia,
a flushed face, increased urination and gastrointestinal complaints. Intoxication
symptoms seen when more than 1 gram of caffeine is
consumed per day include muscle twitching, rambling
flow to thoughts and speech, irregular or rapid heartbeat,
irritability and psychomotor agitation.
Many of us can handle a doubling of our daily caffeine
intake without getting the jitters. But how can we tell
whether the anxieties we feel are related to nicotine
cessation or too much caffeine? It isn’t easy.
Experiment with an up to 50% reduction in daily caffeine
intake if at all concerned. Be careful not to reduce normal
caffeine intake by more than 50% unless you want to add the symptoms of caffeine
withdrawal to those of nicotine withdrawal.
Caffeine withdrawal symptoms can include headache, fatigue, decreased energy,
decreased alertness, drowsiness, decreased contentedness, depressed mood, difficulty
concentrating, irritability, and a foggy mind. Symptoms typically begin 12 to 24 hours after caffeine use ends, reach peak intensity at 20 to 51 hours, and normally last 2 to 9 days.