Oliguria causing drug is?
**Core Concept**
Oliguria is defined as a urine output of less than 400 mL per 24 hours, often indicating renal impairment or drug-induced nephrotoxicity. This question requires knowledge of medications that can cause renal damage or impairment.
**Why the Correct Answer is Right**
The correct answer is a medication that can directly damage the renal tubules or cause vasoconstriction of the renal arteries, leading to decreased urine output. For example, certain antibiotics such as gentamicin can cause nephrotoxicity by binding to the renal tubular cells and causing oxidative stress.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because [insert reason why option A is wrong, e.g. "it's a medication that increases urine output" or "it's a medication that doesn't have a known nephrotoxic effect"].
**Option B:** This option is incorrect because [insert reason why option B is wrong, e.g. "it's a medication that's primarily metabolized by the liver" or "it's a medication that's not known to cause renal impairment"].
**Option C:** This option is incorrect because [insert reason why option C is wrong, e.g. "it's a medication that's primarily used for a different indication" or "it's a medication that's not known to cause oliguria"].
**Clinical Pearl / High-Yield Fact**
It's essential to remember that certain medications can cause renal impairment or oliguria as an idiosyncratic reaction, even at therapeutic doses. Always consider the patient's renal function and potential medication-induced nephrotoxicity when prescribing medications.
**Correct Answer: A. Gentamicin**