Excedrin Extra Strength vs Caffeine tablet (NoDoz): caffeine compared
Caffeine tablet (NoDoz) (1 tablet) has 200 mg of caffeine, 70 mg more than Excedrin Extra Strength (2 tablets, 130 mg) — 1.5× as much per serving.
| Excedrin Extra Strength | Caffeine tablet (NoDoz) | |
|---|---|---|
| Serving | 2 tablets | 1 tablet |
| Caffeine per serving | 130 mg | 200 mg |
| Per fl oz | — | — |
| Share of 400 mg/day | 32% | 50% |
| Servings to reach 400 mg | 3.1 | 2.0 |
| Hours until under 50 mg | 6.9 h | 10.0 h |
| Last one for an 11 PM bedtime · standard (50 mg) | 4:06 PM | 1:00 PM |
| Last one for an 11 PM bedtime · sensitive (25 mg) | 11:06 AM | 8:00 AM |
| Share of the 200 mg pregnancy limit | 65% | 100% |
One serving of each, over 16 hours
Common questions
Which has more caffeine, Excedrin Extra Strength or Caffeine tablet (NoDoz)?
Caffeine tablet (NoDoz) (1 tablet) has about 200 mg versus 130 mg in Excedrin Extra Strength (2 tablets): 70 mg more, or 1.5× as much.
How many Excedrin Extra Strength servings equal one Caffeine tablet (NoDoz)?
About 1.5 servings of Excedrin Extra Strength (2 tablets) match the caffeine in one Caffeine tablet (NoDoz) (1 tablet).
When should I stop drinking Excedrin Extra Strength or Caffeine tablet (NoDoz) before bed?
For an 11 PM bedtime with a 50 mg limit and a 5-hour half-life: last Excedrin Extra Strength by 4:06 PM, last Caffeine tablet (NoDoz) by 1:00 PM. Half-life varies from about 1.5 to 9.5 hours between people.
Method
Caffeine per labeled serving, from the same drink table every calculator here uses (FDA/USDA reference amounts and manufacturer labels; see caffeine content of every drink). Brewed drinks vary batch to batch, so read these as typical values. Decay uses a 5-hour average half-life with a 45-minute absorption ramp; cutoff = bedtime − 5 h × log₂(dose ÷ limit). Percentages use the FDA's 400 mg/day figure for healthy adults and the 200 mg/day limit ACOG gives for pregnancy.
Source — Excedrin Extra Strength: CSPI caffeine chart (Excedrin, 2 caplets), checked 2026-10-13. 65 mg per caplet.
Source — Caffeine tablet (NoDoz): CSPI caffeine chart (NoDoz, 1 caplet), checked 2026-10-13.