T10) Find elimin. rate from dose, Vd and Cl
50. Pharmacokinetics 50.2) Plasma concentrations over time 50.2.1) Plasma concentrations over time
T01: Later plasma concentration Normal 1
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A patient is given 14 mg of a drug in IV push. The volume of distribution of the drug in this patient is 124 L. If the clearance is 21.78, then determine the rate of elimination.
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lb equals 2.46 mg/h kg
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For rate of elimination (dX/dt), we can write:
`(dX)/dt = Cp × Cl`
Plasma concentration is obtained by
`Cp=X/(Vd)=(14 \quad mg)/(124 \quad L)`
`\implies (dX)/dt = (14 \quad mg)/(124 \quad L) × 21.78 \quad L/h`
`∴ (dX)/dt = 2.4590322580645 \quad (mg)/h` (Ans).