What enzyme in the small intestine, responsible for metabolizing about 50% of prescription drugs, is inhibited by compounds in grapefruit?

Answer

CYP3A4

Grapefruit contains furanocoumarins that inhibit the enzyme CYP3A4, which is responsible for metabolizing roughly 50% of all prescription drugs.

What enzyme in the small intestine, responsible for metabolizing about 50% of prescription drugs, is inhibited by compounds in grapefruit?
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