Esters are metabolized in which location?

Study for the NPLEX II Minor Surgery Test. Prepare with flashcards and multiple-choice questions, offering hints and explanations for each task. Master your exam confidently!

Multiple Choice

Esters are metabolized in which location?

Explanation:
Esters are rapidly inactivated by esterases that are abundant in the blood and peripheral tissues, so they’re metabolized in the periphery rather than in the liver. This peripheral hydrolysis often yields para-aminobenzoic acid (PABA) as a key metabolite, along with the corresponding alcohol portion. That quick, peripheral breakdown explains the short duration of ester drugs and why PABA shows up as a metabolite. By contrast, amide-type drugs are mainly metabolized in the liver, while the kidneys and brain are not the primary sites for ester hydrolysis.

Esters are rapidly inactivated by esterases that are abundant in the blood and peripheral tissues, so they’re metabolized in the periphery rather than in the liver. This peripheral hydrolysis often yields para-aminobenzoic acid (PABA) as a key metabolite, along with the corresponding alcohol portion. That quick, peripheral breakdown explains the short duration of ester drugs and why PABA shows up as a metabolite. By contrast, amide-type drugs are mainly metabolized in the liver, while the kidneys and brain are not the primary sites for ester hydrolysis.

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