Long-tail guide
Caffeine Withdrawal After Pepsi
Pepsi typically contains about 38mg of caffeine per 12oz can. A common daily habit of 3 12oz cans adds up to roughly 114mg, a level where quitting abruptly can bring on recognizable withdrawal symptoms.
What to expect
- - People who stop Pepsi often notice the first headache or fog within 12 to 24 hours.
- - At roughly 114mg/day from Pepsi, low energy and irritability are common through days 1 to 3.
- - With a moderate 114mg/day intake, cravings tend to appear around your usual Pepsi time.
- - Sleep quality often improves after a few days, even if the first nights feel restless.
A taper plan starting point
- - Step 1: cut Pepsi to about 60mg/day for a week (smaller or fewer servings).
- - Step 2: drop to about 30mg/day for another week.
- - Step 3: reach 0mg, or hold a small amount if that feels more sustainable.
- - Replace Pepsi breaks with water, a short walk, or a 20-minute nap to ride out dips.
- - Keep steady sleep and meal times; that alone eases many withdrawal days.
This is a general guide. Adjust for your schedule and comfort. If you have health concerns, consult a professional.
Run the calculator
Use the homepage tool to estimate intake from coffee, tea, and energy drinks, then compare it against this guide.
Related intake guides
Caffeine Withdrawal From 50mg/Day
Low intake withdrawal is usually mild, but headaches and fatigue can still happen.
Caffeine Withdrawal From 75mg/Day
Low intake withdrawal is usually mild, but headaches and fatigue can still happen.
Caffeine Withdrawal From 100mg/Day
Common intake range where symptoms are noticeable but often manageable with a short taper.