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The Half-Life

t1/2, Vd & Cl

The half-life (t1/2) is a dependent variable, dependent on the 2 independent variables Cl and Vd.

t1/2 = 0.693 x VD/CL

Adjust the Cl to see what happens to the t1/2 and the Cp-time curve.

Adjust the Vd to see what happens to the t1/2 and the Cp-time curve.

long

short

Cp

time (hrs)

minimum toxic concentration

minimum effective concentration

dose

dose

dose

t

1/2

Low High
Small Large