Don't worry: Spontaneous muscle twitching is a normal phenomena. Increase in pulse rate is also normal after using caffeine or other stimulants including emotional situations.
Answered 11/27/2014
3.8k views
Fast rate: It takes longer than an hour for the heart rate to return to normal(55 -90) if a significant amount of caffeine was ingested.. Alcohol also affects the heart rate. For some people 55 is a normal rate and for others, 90 would be normal.
Answered 8/4/2014
3.8k views
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