A single dose of Nevirapine 2 mg/kg body weight must be given to a newborn of an HIV-positive mother within?

Appeared in: HPSSC - 2015

Explanation

Nevirapine is given to newborns of HIV-positive mothers as post-exposure prophylaxis (PEP) to prevent vertical transmission of the virus.
The medication is most effective when administered as soon as possible after birth, ideally within the first 6 to 12 hours.
The established therapeutic window for this intervention extends up to 72 hours (3 days) after delivery.
After 72 hours, the effectiveness of a single dose of Nevirapine in preventing HIV infection decreases significantly.
Therefore, 72 hours represents the final deadline within which the dose must be given to be considered effective.

Option A: While administering Nevirapine within 4-6 hours is ideal and highly encouraged, it is not the absolute latest time frame allowed for prophylaxis.
Option B: Similar to the 4-6 hour option, administration within 12 hours is excellent practice but does not represent the maximum allowable time limit for giving the dose.
Option C: Giving the dose within 24 hours is also a valid and effective timeframe, but the guidelines permit administration for up to 72 hours.

Clinical Relevance

Nursing practice connection: Knowing Pharmacology: Antiretroviral Prophylaxis for Newborns helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
A nurse's primary role is to ensure the timely and accurate administration of Nevirapine. This includes correctly calculating the dose based on the infant's birth weight (2 mg/kg).
Accurate documentation of the date and time of birth and the time of medication administration is crucial for the infant's medical record and continuity of care.
Nurses must counsel the mother on the importance of her own ART adherence, safe infant feeding practices, and the follow-up schedule for infant HIV testing (which uses PCR, not antibody tests, in early infancy).

How to Approach the Question

First, identify the core of the question: it's asking for the time limit for a specific medical intervention (Nevirapine for a newborn of an HIV+ mother).
This is a factual recall question based on established clinical guidelines (PPTCT/PMTCT protocols).
Recognize the drug (Nevirapine) and its purpose (post-exposure prophylaxis for HIV).
Recall that for PEP, administration should be as soon as possible, but there is a maximum window of effectiveness.
Evaluate the options. 4-6, 12, and 24 hours are all 'good' times, but 72 hours is the internationally recognized outer limit or 'must be given within' timeframe. Select the option that represents this maximum window.

Concept Tested & Keywords

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E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 2120-2122

Practise the full HPSSC - 2015

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