Live readout

Custom dose

Adjust the sliders to model a substance's concentration over time.

Peak — mg/L

Min — mg/L

Avg — mg/L

Steady state —

Drug Dose (mg)

Half-life (hours)

Doses per day

Schedule

Starting amount

Time window (× suggested)

Pick an isotope above to set its half-life and natural time scale.

Educational tool — not medical or radiological advice. Drug half-lives vary by individual. Isotope data from reinpk/radioactive (MIT) cross-checked with Wikipedia.