Kidney and liver diseases induce alterations in drug binding to plasma proteins. These alterations are caused by qualitative and quantitative changes of plasma proteins and the presence of endogenous substances which act as competitive inhibitors of drug binding to plasma proteins. These changes are the most prominent in nephrotic syndrome and uremia among kidney diseases and in cirrhosis among liver diseases. The more important drugs in which the free fraction is changed in these entities are listed in the tables. The changes in drug distribution caused by plasma protein alterations may induce significant changes in entire drug pharmacokinetics. Discussed are theoretically expected and experimentally proven changes in plasma proteins in kidney and liver diseases and their influence to drug action and dosing regimen.
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