Caffeine: Caffeine's effects are measured in hours. Some people are more sensitive than others and can't drink coffee or tea after about 1400 in the afternoon. Effect is certainly gone after 12 hours.
Answered 3/2/2014
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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