Which organ is primarily responsible for metabolizing amide local anesthetics?

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Multiple Choice

Which organ is primarily responsible for metabolizing amide local anesthetics?

Explanation:
Amide local anesthetics are metabolized mainly by the liver. The liver’s enzyme system, particularly the cytochrome P450 enzymes, biotransforms drugs like lidocaine, prilocaine, mepivacaine, and bupivacaine into inactive metabolites that are then excreted. If liver function is reduced, metabolism slows, raising the risk of higher blood levels and prolonged effects. In contrast, ester local anesthetics are primarily hydrolyzed by plasma cholinesterases in the bloodstream. The kidneys handle the excretion of metabolites, and the heart does not play a role in metabolizing amides. So, the liver is the primary organ responsible for metabolizing amide local anesthetics.

Amide local anesthetics are metabolized mainly by the liver. The liver’s enzyme system, particularly the cytochrome P450 enzymes, biotransforms drugs like lidocaine, prilocaine, mepivacaine, and bupivacaine into inactive metabolites that are then excreted. If liver function is reduced, metabolism slows, raising the risk of higher blood levels and prolonged effects. In contrast, ester local anesthetics are primarily hydrolyzed by plasma cholinesterases in the bloodstream. The kidneys handle the excretion of metabolites, and the heart does not play a role in metabolizing amides. So, the liver is the primary organ responsible for metabolizing amide local anesthetics.

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