Zusammenfassung
Die Pharmakokinetik (PK) beschreibt das Verhalten eines Arzneimittels im menschlichen Körper, das im Wesentlichen aus den 4 Prozessen der Absorption, Distribution, Metabolismus und Elimination (ADME) besteht. Dabei werden Arzneimitteldosis, Verabreichungsmodus und Verabreichungsweg mit den im Körper gemessenen Konzentrationsverläufen mathematisch in Beziehung gesetzt. Die Pharmakodynamik (PD) untersucht die Beziehung zwischen Arzneimittelkonzentration und klinischem Effekt, also sowohl Wirkungen als auch Nebenwirkungen. Dabei kann eine evidente Beziehung zwischen Plasmakonzentration und klinischem Effekt bestehen, oder aber ein solcher Zusammenhang kann vollständig fehlen. Dosis-Wirkungs-Beziehungen bei der Verwendung von Onkologika sind nicht immer offensichtlich und teils nur gering oder moderat. Gründe dafür sind die zeitliche Verzögerung zwischen Arzneimittelverabreichung und klinischem Effekt, Abhängigkeit der Wirkung von der Biologie des jeweiligen Tumors, die Vielfalt möglicher unerwünschter Arzneimittelwirkungen oder die Verwendung von Wirkstoffkombinationen. Wirkstoffspezifische Eigenschaften von PK und PD haben einen großen Einfluss auf die Dosierung von Onkologika, beeinflussen das Wirkungs-Nebenwirkungs-Profil sowie Dosisanpassungen und sind deshalb für den Onkologen von Bedeutung.
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Joerger, M., Ritter, C., Burock, S. (2022). Pharmakokinetik, Pharmakodynamik, Interaktionen und Dosismodifikationen. In: Schmoll, HJ. (eds) Kompendium Internistische Onkologie . Springer Reference Medizin. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-46764-0_272-1
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