U.S. doctors online nowAsk doctors free
Palo Alto, CA
A 22-year-old male asked:

How late before sleeping can i drink coffee?

3 doctor answers3 doctors weighed in
A Verified Doctoranswered
A US doctor answeredLearn more
Not after 2 pm: Caffeine overstimulates your senses. If you ares sensitive to caffeine and its effects, avoid drinking any caffeine containing drink after 2pm as it generally takes 8 hrs for the effects of caffeine to wear off our system. This would allow you to have a quality sleep at night.
A Verified Doctoranswered
A US doctor answeredLearn more
Allow 6-7 hours: Caffeine is the most consumed stimulant in the world, No sufficient research to encourage or discourage caffeine. For the majority of healthy adults, consuming less than 400 mg of caffeine a day appears to be safe the half life of caffeine (the time to get rid of half the caffeine in your system) is about 5-6 hours, so it depends on the initial dose of caffeine that you drank during the day
Dr. Galina Nikolskaya
Neurology 12 years experience
Before noon: if you want to make sure your sleep is not affected by it it's best to get all you cofee in you before lunch time, early afternoon the latest

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Educational text
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership
Last updated Nov 2, 2016


Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.