The antidote used for heroin poisoning is:

Combined AIIMS - 2020 (Jodhpur, Bhopal, Patna, Raipur)

Pharmacology

Easy

Appeared in: Combined AIIMS - 2020 (Jodhpur, Bhopal, Patna, Raipur)

Explanation

Heroin is a potent opioid, and its overdose is characterized by the triad of coma, pinpoint pupils, and severe respiratory depression.
Naloxone is a pure, competitive opioid antagonist that rapidly displaces opioids from their receptor sites (primarily mu-receptors).
By binding to these receptors, Naloxone quickly reverses the life-threatening effects of the opioid, especially respiratory depression, which is the primary cause of death in heroin overdose.
Its action is rapid (within minutes) but has a shorter duration than most opioids, so repeated doses or a continuous infusion may be necessary.

Option B: Flumazenil is a specific antagonist for benzodiazepines, not opioids. It works by competing with benzodiazepines at the GABA-A receptor complex.
Option C: Digibind is an antibody fragment (Digoxin Immune Fab) that specifically binds to digoxin molecules, neutralizing them. It has no effect on opioids.
Option D: Protamine sulfate is a chemical antagonist that binds with heparin (an acidic drug) to form a stable, inactive salt complex. It does not interact with opioids.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pharmacology: Antidotes for Poisoning as background academic context rather than a clinical decision trigger.
Rapid identification of opioid overdose (pinpoint pupils, slow/absent breathing, unresponsiveness) is a critical nursing skill. Prompt administration of Naloxone can be life-saving.
Nurses must monitor the patient closely after Naloxone administration because its half-life is shorter than that of most opioids. The patient may relapse into respiratory depression, requiring additional doses.
Patient education on discharge is vital, especially for patients prescribed opioids for pain. This includes teaching family members how to recognize an overdose and administer naloxone (e.g., Narcan nasal spray), which is available over-the-counter in many places.

How to Approach the Question

First, identify the core of the question: it asks for the specific antidote for 'heroin poisoning'.
Second, classify the substance. Recall or identify that heroin is an opioid.
Third, access your knowledge of pharmacology and toxicology to match the drug class (opioids) with its specific antagonist.
Evaluate the options provided. Naloxone is the known opioid antagonist. The other options are antagonists for different drug classes.
Confirm your choice. Naloxone is the standard, first-line treatment for opioid overdose. This makes it the correct answer.

Concept Tested & Keywords

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