A patient came to ED unconscious with pinpoint pupil, lacrimation and history of substance abuse. Which of the drug will be administered?

1. A

   Flumazenil

2. B

   Naloxone

3. C

   Lorazepam

4. D

   Naltrexone

Appeared in: AIIMS Delhi NO- 2019

Explanation

• The patient's symptoms of unconsciousness (coma) and pinpoint pupils (miosis) are hallmark signs of an opioid overdose.
• Naloxone is a competitive opioid antagonist that rapidly reverses the effects of opioids, including respiratory depression and sedation.
• It is the first-line, life-saving emergency treatment for acute opioid toxicity.
• The goal of administration is to restore adequate spontaneous breathing; it is not necessarily to completely reverse all sedation.

Why Other Options Were Wrong

• Option A: Flumazenil is the antidote for benzodiazepine overdose, not opioid overdose. Benzodiazepine overdose typically presents with sedation and confusion but does not cause pinpoint pupils.
• Option C: Lorazepam is a benzodiazepine, which is a central nervous system (CNS) depressant. Administering it to an already unconscious patient would worsen respiratory and CNS depression, potentially leading to respiratory arrest.
• Option D: Naltrexone is also an opioid antagonist, but it is long-acting and primarily used for relapse prevention in patients with opioid or alcohol use disorder after they have been detoxified. It is not used for acute overdose reversal.

Related Visual

Clinical Relevance

• Nursing practice connection: Use the key finding related to Pharmacological management of acute opioid overdose to guide bedside assessment, documentation, and the next nursing action.
• Recognizing the toxidrome for opioid overdose is a critical nursing skill in any setting, especially the emergency department.
• Nurses must be prepared to administer Naloxone and monitor the patient closely, as its half-life is shorter than many opioids, and the patient can relapse into respiratory depression.
• What if? If the patient was unconscious with a history of substance abuse but had normal or dilated pupils, the nurse should suspect other causes like benzodiazepine overdose, alcohol intoxication, or a mixed overdose, and anticipate orders for different interventions, such as Flumazenil or supportive care.

How to Approach the Question

• First, analyze the clinical scenario presented in the question stem. Identify the key signs and symptoms: unconsciousness, pinpoint pupils, and lacrimation.
• Recognize this combination of symptoms as a classic toxidrome (a group of signs and symptoms constituting the basis for a diagnosis of poisoning).
• Correlate the toxidrome with a specific class of drugs. Unconsciousness and pinpoint pupils strongly point towards opioid toxicity.
• Evaluate the given options. Each option is a drug with a specific purpose. Your task is to select the antidote for the identified drug class.
• Recall or deduce the mechanism of action for each drug: Naloxone is an opioid antagonist, Flumazenil is a benzodiazepine antagonist, Lorazepam is a benzodiazepine agonist (depressant), and Naltrexone is a long-acting antagonist for maintenance.
• Select the drug that directly counteracts the effects of an opioid overdose in an emergency setting, which is Naloxone.

Concept Tested & Keywords

• Concept Tested: Pharmacological management of acute opioid overdose.
• Stem keywords: unconscious, pinpoint pupil, lacrimation, substance abuse
• Lead-in keywords: drug will be administered
• Clinical cues: The combination of unconsciousness and pinpoint pupils is a classic toxidrome for opioid overdose.

Question ID

Q2uaJxPtlxshUFxIaFgQF8

Copy ID

Reference Book

E6 Kaplan Sadock's Synopsis of Psychiatry-2022 (pp 1-3768 of 3768) pp. 946-948, 2117-2119, 2116-2118