In a child with high blood pressure receiving methyldopa, what should the nurse know about this medicine?& x2… - NORCET 9 Mains - 2025

NORCET 9 Mains - 2025

Pharmacology

Easy

Appeared in: NORCET 9 Mains - 2025

Explanation

Methyldopa is a centrally acting sympathoplegic drug used to treat hypertension.
Its mechanism involves reducing sympathetic outflow from the central nervous system (CNS).
The most common side effect resulting from this CNS action is sedation or drowsiness, particularly at the beginning of therapy or when the dose is increased.
Nurses must prioritize patient safety by educating the family about this effect and implementing precautions to prevent injury.

Option B: Methyldopa does not cause urine to turn blue. It can cause urine to darken (turn red, brown, or black) upon standing due to the oxidation of its metabolites.
Option C: Continuous cardiac monitoring is not required for routine oral administration of methyldopa for chronic hypertension.
Option D: While a larger portion of the daily dose is often given at bedtime to minimize daytime sedation, there is no specific requirement to administer all doses 'before meals'.

Visual 1: Flowchart: Mechanism of action of Methyldopa. This visual would illustrate how the drug is converted to its active metabolite in the brain, stimulates central alpha-2 receptors, and ultimately reduces sympathetic outflow to the heart and blood vessels.
Visual 2: Infographic: Common vs. Serious Side Effects of Methyldopa. This would visually separate frequent, manageable side effects like drowsiness and dry mouth from rare but critical ones like hemolytic anemia and hepatotoxicity, helping nurses prioritize their monitoring.

Clinical Relevance

Nursing practice connection: Use the key finding related to Pharmacological knowledge of methyldopa, specifically its common side effects and nursing considerations to guide bedside assessment, documentation, and the next nursing action.
The primary nursing responsibility when a patient is on methyldopa is ensuring safety. Due to the high incidence of drowsiness and risk of orthostatic hypotension, fall precautions are essential, especially for children and older adults.
Nurses must educate the patient and their family that the sedative effect is most pronounced at the start of therapy and usually diminishes over time. This helps with adherence and reduces anxiety.
What if? If a child on methyldopa develops an unexplained fever, right upper quadrant abdominal pain, and jaundice, the nurse must suspect drug-induced hepatitis. The immediate action is to withhold the medication, notify the healthcare provider, and prepare for liver function tests, as this is a potentially fatal adverse reaction.

How to Approach the Question

First, identify the core of the question. It asks for the most important piece of knowledge for a nurse regarding a child taking methyldopa.
Analyze the drug class. Methyldopa is a centrally acting antihypertensive. This classification immediately suggests that its primary effects and side effects will involve the central nervous system (CNS).
Evaluate each option based on this knowledge. Option A (drowsiness) is a classic CNS side effect. Options B (urine color), C (cardiac monitoring), and D (meal timing) relate to different pharmacological properties.
Recall or deduce the most common side effects of centrally acting drugs. Sedation and drowsiness are hallmarks of this class.
Eliminate the incorrect options. Blue urine is a very specific and rare side effect associated with other drugs. Continuous monitoring is for IV emergency medications. Specific meal timing is not a primary concern for methyldopa.
Conclude that the most common and clinically significant effect the nurse must know about and manage is drowsiness, making it the correct answer.

Concept Tested & Keywords

Concept Tested: Pharmacological knowledge of methyldopa, specifically its common side effects and nursing considerations.
Stem keywords: child, high blood pressure, methyldopa, nurse
Lead-in keywords: what should the nurse know
Clinical cues: Age/sex group narrows the expected diagnosis, intervention, or normal reference range.
Negative lead-in flag: false

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