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3 Cards in this Set

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Half Life

Time required for the original dose to be reduced by half

First Order Half Life Equations

Cp = Cpo e ^(-kt)



Cpo - concentration of chemical in blood at time 0


k - elimination rate constant



Dependent only on the elimination rate constant



k = 0.693/t(half)


t(half) = 0.693/k

Half life slope

Steeper slope = shorter half life = faster elimination