Half-Life & Dosing

Staying in the window

An interactive lesson with 5 steps, about 5 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• Drug levels fall by half every half-life.
• Steady state after ~4–5 half-lives; shorter intervals give smaller swings.
• Loading doses reach the target level quickly.

Steps

1. Down by half
2. Doses pile up
3. Design the schedule
4. Washing out
5. A loading dose