# A 6-year-old (22 kg) child with community-acquired pneumonia is sent to the clinic with a new prescription for doxycycline 50 mg PO twice daily for 7 days. Which is the most appropriate nursing action? > source: MyMerci (mymerci.kr) > url: https://mymerci.kr/pages/nclex_q.php?qn_id=375245&lang=en > language: en > subject: Medical Emergencies > category: PA ## Question A 6-year-old (22 kg) child with community-acquired pneumonia is sent to the clinic with a new prescription for doxycycline 50 mg PO twice daily for 7 days. Which is the most appropriate nursing action? ## Option 1. After verifying the child’s weight of 22 kg, calculate the dose: 50 mg twice daily gives 2.3 mg/kg per dose, near the lower limit of the recommended 2–4 mg/kg/day for pediatric pneumonia; advocate for increasing to 75 mg twice daily to provide 3.4 mg/kg per dose, ensuring adequate antimicrobial coverage and reducing the risk of treatment failure and the development of drug-resistant pathogens. 2. Instruct the parent to administer each dose of doxycycline with a full glass of milk or a serving of yogurt to lessen gastrointestinal irritation; explain that although tetracyclines can chelate with calcium, doxycycline’s binding is minimal at standard doses, so this practice will not significantly reduce absorption and will improve comfort, thereby promoting adherence during the 7-day course. 3. Given the acute nature of the pneumonia and the short 7-day course, administer the doxycycline as prescribed; inform the parents that permanent tooth staining from tetracyclines is predominantly a risk with prolonged treatment in children under 3 years, and at age 6 with a brief therapy the likelihood is exceedingly low, so the immediate benefit of treating the infection outweighs this concern. 4. Hold the dose and contact the prescriber to discuss; tetracyclines are generally contraindicated in children under 8 years because of permanent yellow-brown tooth discoloration and possible bone growth retardation; suggest age-appropriate alternatives like amoxicillin or azithromycin per CDC/AAP guidance; brief courses for tickborne disease such as Lyme are an exception but not for typical CAP. **✔ Correct answer** **Correct answer: 4** ## Explanation Tetracyclines (doxycycline, minocycline, tetracycline, demeclocycline) are generally contraindicated in children under 8 years because they bind calcium in developing teeth and bones, causing permanent yellow to brown tooth discoloration, enamel hypoplasia, and possible reversible bone growth retardation. There is one important exception: doxycycline is now considered safe and recommended for short courses (less than 21 days) for confirmed or suspected tickborne illness such as Lyme disease, Rocky Mountain spotted fever, ehrlichiosis, anaplasmosis because of strong evidence that brief use does not cause significant tooth discoloration and the diseases can be life-threatening if untreated. Standard nursing response: (1) hold the dose, communicate with the prescriber, clarify indication; (2) for community-acquired pneumonia in pediatrics, first-line is amoxicillin (or alternative such as azithromycin in penicillin allergy); (3) document the rationale and ensure the prescriber confirms the change; (4) educate the family. Administering, increasing the dose, or giving with milk (which would also reduce absorption) are unsafe. ## In-depth explanation Pediatric tetracycline = age 8 cutoff with the tickborne-disease exception. 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Always follow current clinical guidelines and your institution’s protocols._