5-6 hours: https://www.news-medical.net/health/Caffeine-Pharmacology.aspx Interesting question that promoted some learning. There is a lot of variability that depends not only on an individual but how the coffee is prepared or what is added to the coffee.
Answered 11/16/2018
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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
5 doctors weighed in across 2 answers
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