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A 60-year-old male asked:

Hi doctors! how many hours before i go to sleep would it be ok to drink regular keurig coffee and not have the caffeine adversely affect my sleep?

2 doctor answers3 doctors weighed in
Dr. John Bodell
General Surgery 51 years experience
About 6 hours: Many people are affected by regular or decafinated coffee. I would consider drinking water rather than coffee. A herbal tea may be an alternative.
Dr. Daniel Ziegler
Emergency Medicine 31 years experience
Depends on you: There is no easy way to answer this question. The half-life (time it takes to clear half the drug from your body) of caffeine is 6 hours. If you drink coffee all day the amount in your system stacks up but then you probably have a high tolerance. Truth is, some people sleep like babies on caffeine and others are wide awake all night from drinking a cup at noon. Regular use blunts the wakefulness.

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Last updated Dec 13, 2020


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