Drug Half-Life Simulator
Visualize how drugs are absorbed and eliminated from your body using pharmacokinetic modeling. Select a drug, configure your dosing schedule, and see the concentration curve in real time.
Educational tool only. Not medical advice. Always follow your healthcare provider's instructions.
2d
6h1 week
Caffeine
Caffeine
The world's most consumed psychoactive stimulant, found in coffee, tea, and energy drinks.
Half-life: 5h (3h–7h)
Peak at: 45min
Typical dose: 100mg
Frequency: As needed
Half-life5hRange: 3h–7h
Time to peak45minAfter single dose
90% eliminated17.4hAfter single dose
At 24 hours4%Remaining in body
What this means
After taking a single dose of Caffeine, the concentration in your body peaks around 45min after ingestion. With a half-life of 5h, half the drug is eliminated every 5h. By 17.4h, approximately 90% has been cleared. After 24 hours, 4% of the drug remains in your body.
Concentration areaDose timing50% reference