Interactive comparison
Put multiple half-life curves on one timeline.
Choose reviewed profiles and inspect how quickly their normalized first-order curves separate. Every line starts at 100%, so this is a persistence comparison rather than a dose, concentration, potency, or risk comparison.
Choose two to four profiles
The chart uses each profile's reviewed representative value. It compares mathematical curves, not potency, effects, or safety.
3 of 4 selected
| Elapsed time | Caffeine | Alprazolam | Modafinil |
|---|---|---|---|
| 0 min | 100.0% | 100.0% | 100.0% |
| 15 h | 12.5% | 39.5% | 50.0% |
| 30 h | 1.6% | 15.6% | 25.0% |
| 45 h | 0.2% | 6.2% | 12.5% |
| 2.5 d | 0.0% | 2.4% | 6.3% |
| 3.1 d | 0.0% | 1.0% | 3.1% |
How to read this comparison
The longest selected half-life sets the timeline. Shorter curves may approach zero early, while longer curves retain a visible tail. Open each profile before drawing conclusions: route, formulation, analyte, metabolites, study population, and the meaning of the reported half-life can differ.
Equal percentages do not mean equal effects or equal risk. The tool deliberately avoids dose inputs because the comparison is about the shape of relative decline, not an estimate of concentration inside a person.