A 6 yr old child presents with malignant hypeension. The Drug of choice is –
**Core Concept**
Malignant hypertension in children is a medical emergency that requires immediate management to prevent target organ damage. The primary goal is to lower blood pressure and control symptoms.
**Why the Correct Answer is Right**
The drug of choice for managing malignant hypertension in children is typically a combination of medications, but the primary agent used is usually **nitroprusside**. Nitroprusside is a potent vasodilator that works by releasing nitric oxide, which relaxes smooth muscle and dilates blood vessels, thereby reducing blood pressure. This effect is mediated through the activation of guanylate cyclase, leading to increased levels of cyclic guanosine monophosphate (cGMP).
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because **labetalol** is a mixed alpha/beta-adrenergic antagonist that may not be effective in rapidly reducing blood pressure in malignant hypertension.
**Option B:** This option is incorrect because **nifedipine** is a calcium channel blocker that may cause reflex tachycardia and is not the first-line treatment for malignant hypertension.
**Option C:** This option is incorrect because **enalapril** is an angiotensin-converting enzyme (ACE) inhibitor that may not be effective in rapidly reducing blood pressure in malignant hypertension.
**Clinical Pearl / High-Yield Fact**
Nitroprusside is a highly potent vasodilator that requires close monitoring of blood pressure and cardiac function due to its potential to cause hypotension and cardiac arrest.
**Correct Answer:** C. Enalapril is incorrect, but the option was missing.