Xi needs to stay awake another hour to study for his English

Xi needs to stay awake another hour to study for his English final, so he drinks several cups of cola. When he\'s done studying, he finds that he can\'t sleep even though he wants to, he feels agitated, his muscles twitch, his heartbeat is irregular, and he feels nauseated. What is causing Xi to feel this way?

a. caffeine

b. insomnia

c. narcolepsy

d. sugar

Solution

The above symptoms seems to be the over dose of CAFFEINE due to excessive cola drink.

Caffeine is quickly absorbed from blood circulation and act as CNS STIMULANT. Hence Xi seems to have sleeplessness.

Caffeine interferes with calcium absorption and metabolism and hence overdot causes muscle twitches.

It increases heart rate and hence arrhythmia.