A patient is prescribed disulfiram for alcohol dependence. The nurse should instruct the patient that drinking alcohol while on this medication may cause:

Appeared in: NORCET 7 Prelims -2024

Explanation

Disulfiram is an alcohol aversion agent that works by inhibiting the enzyme aldehyde dehydrogenase.
This inhibition causes a toxic buildup of acetaldehyde in the blood if alcohol is consumed.
The resulting disulfiram-ethanol reaction (DER) is characterized by a collection of severe, unpleasant symptoms.
Severe nausea and copious vomiting are hallmark symptoms of the DER, serving as a powerful deterrent.
Other key symptoms include flushing, throbbing headache, tachycardia, and sweating.

Option A: While dizziness (vertigo) can occur during the disulfiram-ethanol reaction, fatigue is a common side effect of the medication itself, even without alcohol consumption. The combination is not the most accurate or primary description of the acute reaction.
Option C: The disulfiram-ethanol reaction does not cause hyperactivity. It is a physically and mentally distressing state that leads to weakness, anxiety, and exhaustion, not increased activity.
Option D: Weight gain is not a known side effect of disulfiram or the disulfiram-ethanol reaction. The severe nausea and vomiting associated with the reaction would more likely lead to temporary weight loss if anything.

Visual 1: Flowchart - A diagram showing the metabolic pathway of ethanol. One path shows normal metabolism to acetate. The other path shows the pathway with disulfiram, highlighting the block at aldehyde dehydrogenase and the resulting accumulation of acetaldehyde.
Visual 2: Infographic - An infographic summarizing the key symptoms of the Disulfiram-Ethanol Reaction (DER), using icons for nausea, vomiting, headache, flushing, and rapid heart rate.

Clinical Relevance

Nursing practice connection: Use the key finding related to Pharmacology of Disulfiram and the Disulfiram-Ethanol Reaction to guide bedside assessment, documentation, and the next nursing action.
Patient education is the cornerstone of safe disulfiram therapy. Nurses must ensure the patient understands the severe consequences of drinking alcohol and can identify hidden sources of alcohol in foods, sauces, and hygiene products.
It is a critical patient safety issue. A severe DER can be life-threatening, potentially causing myocardial infarction, cardiovascular collapse, and convulsions. Proper patient counseling mitigates this risk.
What if? If a patient on disulfiram accidentally uses an alcohol-based mouthwash and feels flushed and nauseous, the nurse should instruct them to stop using the product immediately, monitor their symptoms, and seek medical attention if symptoms worsen. This reinforces the need for vigilance.

How to Approach the Question

First, identify the drug in the question: disulfiram. Recall its purpose, which is to treat alcohol dependence.
Next, recall the mechanism of action. Disulfiram is an aversion therapy agent. This means it causes a negative reaction when the target substance (alcohol) is used.
Think about the specific interaction between disulfiram and alcohol. It blocks an enzyme, leading to the buildup of a toxic substance (acetaldehyde).
Evaluate the options based on the known symptoms of this toxic reaction (the disulfiram-ethanol reaction).
Select the option that describes the most prominent and severe symptoms. Severe nausea and vomiting are classic, hallmark signs of this reaction.

Concept Tested & Keywords

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Practise the full NORCET 7 Prelims -2024

Attempt every question from this paper in a timed mock, then review the full solution for each one.