Drug elimination refers to drug removal from the body, either through urine or bile, by the kidneys or liver, respectively. A pharmacokinetic parameter, drug clearance, measures the efficiency of drug removal from the bloodstream within a specific time frame. It is calculated as the rate at which a drug is eliminated from plasma divided by the drug's concentration in plasma.

Drug clearance is not limited to renal excretion but encompasses all organs involved in drug elimination, including the liver, lungs, and biliary system. The sum of clearances by all eliminating organs is known as the total body or systemic clearance. It can be expressed as a combination of renal clearance and nonrenal clearance.

Understanding drug elimination kinetics and the concept of drug clearance is essential for designing effective dosage regimens and ensuring safe and optimal drug therapy. It allows for individualized adjustments based on a person's specific needs.

Exceeding the prescribed dosing rate can overload elimination pathways and decrease drug clearance. This leads to elevated plasma drug concentrations, which can result in toxic levels and cause adverse effects.

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6.12 : Drug Clearance: Overview

Pharmacokinetics: Drug Excretion and Clearance

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6.1 : Eliminierung von Medikamenten: Überblick

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6.2 : Eliminationskinetik: Erste Ordnung und Nullte Ordnung

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6.3 : Ausscheidung von Arzneimitteln in der Niere: Überblick

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6.4 : Arzneimittelausscheidung in der Niere: Glomeruläre Filtration

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6.5 : Arzneimittelausscheidung in der Niere: tubuläre Reabsorption

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6.6 : Nierenmedikamentenausscheidung: Tubuläre Sekretion

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6.7 : Arzneimittelausscheidung in der Niere: Wirkung des pH-Werts des Urins, der Flussrate und des Arzneimittels pka

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6.8 : Ausscheidung von Lebermedikamenten: Enterohepatisches Radfahren

Pharmacokinetics: Drug Excretion and Clearance

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6.9 : Ausscheidung von Medikamenten in der Leber: Einflussfaktoren

Pharmacokinetics: Drug Excretion and Clearance

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6.10 : Arzneimittelausscheidung: Lungen- und Drüsenwege

Pharmacokinetics: Drug Excretion and Clearance

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6.11 : Arzneimittelausscheidung: Verschiedene Wege

Pharmacokinetics: Drug Excretion and Clearance

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6.13 : Clearance-Modelle: Physiologische Modelle

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6.14 : Ausverkaufsmodelle: Fachmodelle

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6.15 : Abstandsmodelle: Modelle ohne Kompartiment

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