Drug Concentration Over Time

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The page below is a sample from the LabCE course Pharmacology in the Clinical Lab: Therapeutic Drug Monitoring and Pharmacogenomics. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Drug Concentration Over Time

At some point after a drug is introduced into the body, it will reach a peak concentration. The drug concentration will start to decrease as the drug is eliminated. The figure on the right shows a typical drug kinetic when a drug is given intravenously (IV).