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.
For study reference only. Always follow current clinical guidelines and your institution’s protocols.