A patient scheduled for hemodialysis has a prescription for an antihypertensive medication. What is the most appropriate nursing action regarding this medication on the day of dialysis?

Appeared in: RUHS, Jaipur, M.Sc Nursing Entrance Exam-2015

Explanation

Withholding antihypertensive medication before hemodialysis is the standard and safest nursing practice.
Hemodialysis removes excess fluid from the body, which naturally causes a significant drop in blood pressure.
Giving an antihypertensive before treatment can compound this effect, leading to severe intradialytic hypotension (a dangerous drop in blood pressure during the procedure).
Many blood pressure medications are water-soluble and are removed from the blood during dialysis (dialyzable), which would make the pre-dialysis dose ineffective for long-term blood pressure control.

Option A: Administering the medication as scheduled ignores the profound hypotensive effect of the dialysis procedure itself, creating a high risk for a dangerous drop in blood pressure.
Option C: Giving half the dose is not an evidence-based practice. It is an arbitrary adjustment that still carries a risk of causing hypotension and does not guarantee a therapeutic effect.
Option D: Patients undergoing hemodialysis for renal failure are typically on strict fluid restrictions to prevent fluid overload between treatments. A large glass of water is contraindicated.

Clinical Relevance

Nursing practice connection: Use the key finding related to Medication management for patients undergoing hemodialysis to guide bedside assessment, documentation, and the next nursing action.
Patient safety is the top priority. Preventing intradialytic hypotension is a critical nursing responsibility as it can lead to patient discomfort (cramps, nausea), and serious complications like organ ischemia or cardiac events.
Nurses must exercise critical thinking and be prepared to question a medication order that could harm the patient. While following protocols, a nurse should always clarify with the provider if an order seems inappropriate, such as giving a standard antihypertensive dose pre-dialysis.
What if? If the patient's pre-dialysis blood pressure was dangerously high (e.g., greater than 200/110 mmHg), the nurse should not automatically give the medication. The correct action is to immediately notify the nephrologist or dialysis unit physician for specific orders. A small dose of a short-acting, non-dialyzable agent might be ordered in this specific situation.

How to Approach the Question

First, identify the core clinical scenario: a patient is about to undergo hemodialysis.
Next, recall the primary physiological effect of hemodialysis: it removes a large volume of fluid, which causes a decrease in blood pressure.
Then, analyze the medication in question: an antihypertensive, which is designed to lower blood pressure.
Synthesize these two facts: combining a procedure that lowers blood pressure with a medication that also lowers blood pressure creates a synergistic effect and a high risk of severe hypotension.
Evaluate the options based on safety. Administering the drug (Option A) or a partial dose (Option C) is unsafe. Giving it with excess water (Option D) is contraindicated due to fluid restrictions.
Conclude that withholding the medication (Option B) is the only action that mitigates the risk of hypotension and is therefore the most appropriate and safest choice.

Concept Tested & Keywords

Concept Tested: Medication management for patients undergoing hemodialysis.
Stem keywords: hemodialysis, antihypertensive medication, nursing action
Lead-in keywords: most appropriate
Clinical cues: The patient is scheduled for hemodialysis, a procedure known to cause significant fluid shifts and blood pressure changes.

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E6 Pharmacology Nursing Lilley 11e Part 2 pp. 46-48, 76-78

E6 Nelson Textbook of Pediatrics(2024) — Volume 2 p. 1049-1051

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