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Pharmacology · Endocrine drugs: budesonide in Crohn disease
Sample itemFor mild to moderate ileocaecal Crohn disease, oral controlled-release budesonide is preferred to prednisolone. What is the main reason?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
D. High first-pass hepatic metabolism keeps systemic steroid exposure low
Budesonide is a potent glucocorticoid with about 90 percent first-pass metabolism by hepatic CYP3A4. Its local anti-inflammatory action in the ileum and right colon is retained, with fewer systemic steroid effects such as adrenal suppression. CYP3A4 inhibitors like ketoconazole raise its systemic effect.
Option by option
A. It acts as an aminosalicylate and not as a steroid
Budesonide is a glucocorticoid and is not an aminosalicylate.
B. It is not absorbed from the intestine at all
It is absorbed, but then largely metabolised in the liver on first pass.
C. It has mineralocorticoid activity that helps recovery
Mineralocorticoid activity is minimal and is not a benefit.
D. High first-pass hepatic metabolism keeps systemic steroid exposure low (correct)
Correct. Extensive first-pass metabolism limits systemic steroid effects.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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