A nurse is caring for a child with moderate postoperative pain. According to the World Health Organization Pain Ladder, which of the following is the most appropriate initial intervention?

Choice A reason: Distraction techniques are useful adjuncts but not primary interventions for moderate pain. They help reduce anxiety and provide comfort but do not adequately address physiological pain pathways. Relying solely on distraction may result in under-treatment. Choice B reason: Administering a non-opioid analgesic on a regular schedule aligns with the WHO Pain Ladder for moderate pain. Scheduled dosing maintains consistent analgesia, prevents pain escalation, and supports recovery. Agents like acetaminophen or ibuprofen are commonly used. Choice C reason: PRN dosing may lead to inconsistent pain control and delayed relief. For moderate pain, scheduled administration ensures therapeutic levels and better outcomes. PRN use is more appropriate for mild or intermittent pain. Choice D reason: IV morphine is reserved for severe pain or when non-opioids are ineffective. Starting with opioids for moderate pain contradicts the stepwise approach of the WHO Pain Ladder, which emphasizes escalating therapy based on severity.