A nurse in an emergency department is caring for a child following an overdose of acetylsalicylic acid. Which of the following medications should the nurse plan to administer?

Acetylsalicylic acid (aspirin) overdose in children is a medical emergency that leads to a complex disturbance of the acid-base balance and interferes with normal clotting mechanisms. Aspirin inhibits the synthesis of vitamin K-dependent clotting factors and can induce a state of hypoprothrombinemia, significantly increasing the risk of spontaneous or internal hemorrhage. Nursing management involves stabilization, gastrointestinal decontamination, and the administration of specific agents to counteract the systemic effects of the salicylate toxicity. Rationale: A. Naloxone is a concentrated opioid antagonist used specifically to reverse respiratory depression and sedation caused by opioid overdose (such as morphine or fentanyl). It works by competing for opioid receptor sites in the brain. Because acetylsalicylic acid is a non-steroidal anti-inflammatory drug (NSAID) and not an opioid, naloxone would have no therapeutic effect in reversing the metabolic acidosis or the toxic effects associated with an aspirin overdose. B. Phytonadione (Vitamin K) is administered in cases of aspirin overdose to manage the risk of bleeding. Large doses of salicylates can interfere with the liver's ability to produce prothrombin, leading to a prolonged prothrombin time (PT). By providing exogenous Vitamin K, the nurse helps restore the body’s ability to synthesize clotting factors, thereby reducing the risk of hemorrhagic complications while the body clears the toxic levels of salicylate from the system. C. Midazolam is a benzodiazepine used for sedation, anxiety reduction, and the management of active seizures. A severe aspirin overdose can eventually lead to neurological symptoms or seizures in its terminal stages, but midazolam is not a corrective treatment for the overdose itself. Furthermore, it could potentially mask neurological changes that the nurse needs to monitor closely, such as the progression of salicylate-induced encephalopathy. D. Flumazenil is a specific reversal agent used for benzodiazepine toxicity. It works by competitively inhibiting the activity at the benzodiazepine receptor site on the GABA receptor complex. It has no pharmacological interaction with salicylates and would be ineffective in treating a child who has ingested a toxic amount of acetylsalicylic acid, as the underlying pathology involves metabolic and hematologic dysfunction.