A client presents with diaphoresis, palpitations, nervousness, and tachycardia approximately 4 hours after taking his usual morning insulin. Which treatment is appropriate for this client?

Choice A rationale: The described symptoms—diaphoresis, palpitations, nervousness, and tachycardia—are classic signs of hypoglycemia, or low blood glucose. These symptoms are caused by the release of counter-regulatory hormones like epinephrine and cortisol. The first appropriate action is to check the blood glucose level to confirm hypoglycemia and then administer carbohydrates to rapidly raise it back to a safe range. Choice B rationale: Giving nitroglycerin and performing an electrocardiogram are interventions for cardiac issues, such as angina or myocardial infarction. While palpitations and tachycardia are present, they are secondary to the hypoglycemia-induced stress response, not a primary cardiac event. Addressing the underlying hypoglycemia is the priority, as these cardiac symptoms are a direct physiological consequence of the low blood sugar. Choice C rationale: Checking pulse oximetry and administering oxygen are interventions for respiratory compromise or hypoxemia. The client's symptoms are not indicative of an issue with oxygenation. Although the body is under stress, the primary problem is a metabolic imbalance, specifically low blood glucose. Providing oxygen would not correct the underlying physiological cause of the symptoms. Choice D rationale: Restricting salt, administering diuretics, and performing paracentesis are treatments for fluid overload, ascites, and conditions like congestive heart failure or severe liver disease. The client's symptoms are not consistent with these conditions. These interventions would be inappropriate and could be harmful, as they do not address the metabolic derangement causing the hypoglycemia.