Caffeine withdrawal timeline: onset, peak and how long it lasts
Caffeine withdrawal is real and well documented — it is even a recognized diagnosis in the DSM-5. If you drink coffee, tea or energy drinks daily and then stop, you can expect a fairly predictable few days.1
Here is the timeline most people follow.
Last reviewed July 6, 2026
The caffeine withdrawal timeline
- 12–24 hours
Onset
Symptoms usually begin 12 to 24 hours after your last dose of caffeine — often felt first as a dull, building headache.1
headachedrowsinesslow energy - 20–51 hours
Peak
Symptoms typically peak somewhere between 20 and 51 hours after stopping. This is when the headache, fatigue and irritability are usually at their worst.1
headachefatigueirritabilitydifficulty concentrating - 2–9 days
Why caffeine withdrawal happens
Caffeine blocks adenosine, a chemical that promotes drowsiness, and it constricts blood vessels in the brain. When you stop suddenly, blood flow rebounds — a leading explanation for the classic withdrawal headache.1 Headache is the most common symptom, reported in up to half of cases, alongside fatigue, drowsiness, low mood and trouble concentrating.1
Notably, withdrawal can occur even after stopping relatively low daily doses — as little as a single small cup of coffee a day — and about one in eight people experience clinically significant distress or impairment as a result.1
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Common caffeine withdrawal symptoms
- Headache (the most common symptom)
- Fatigue, drowsiness and low energy
- Difficulty concentrating and "brain fog"
- Irritability and low mood
- Anxiety in some people
- Flu-like feelings such as nausea or muscle aches2
Common questions
How long does a caffeine withdrawal headache last?
Headache tends to appear 12–24 hours after your last caffeine, peaks around 20–51 hours, and eases as the whole episode resolves within 2–9 days.1
Is caffeine withdrawal a real medical condition?
Yes — caffeine withdrawal is a recognized clinical diagnosis, and symptoms like headache and fatigue are consistent and well studied.1
How much caffeine causes withdrawal?
It varies, but withdrawal can occur even after stopping a low daily intake — as little as one small cup of coffee a day for some people.1
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Keep reading
Sources
This guide is educational and is not medical advice. Timelines vary from person to person. If you are quitting heavy alcohol use, or have a medical condition, talk to a doctor before you stop — some withdrawals can be dangerous. In the US you can reach the free, confidential SAMHSA National Helpline at 1-800-662-4357, or call or text 988.