Systemic pharmacokinetics (PK)

Systemic pharmacokinetics refers to the quantitative study of how a drug substance is absorbed, distributed, metabolized, and excreted (ADME) by the body over time (StatPearls: Pharmacokinetics, 2023). It is not a biological target such as a receptor, enzyme, or transporter, but rather a pharmacological concept describing the movement of a drug through the systemic circulation and tissues (Merck Manual: Overview of Pharmacokinetics, 2022). Key parameters like clearance, volume of distribution, and half-life are utilized to determine optimal dosing regimens and predict drug behavior across diverse patient populations (FDA: Clinical Pharmacology Section of Labeling, 2016). Understanding systemic pharmacokinetics is essential for ensuring that a drug reaches its intended molecular target at a concentration that is both effective and safe. Factors such as age, genetics (pharmacogenomics), and underlying disease states can significantly alter these processes, necessitating dose adjustments to avoid toxicity or therapeutic failure.

Other names

ADMEPharmacokineticsDrug dispositionClinical pharmacokinetics

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