A 36-year-old diabetic patient reports taking several large doses of Ibuprofen after a back injury. Upon assessment the nurse notes weakness, palpitations, and EKG changes (peaked T-waves). Based on these findings, which condition is the client most likely experiencing?

Choice A rationale Hyperkalemia is the most likely condition because Ibuprofen is a nonsteroidal anti-inflammatory drug that can impair renal prostaglandin synthesis, leading to decreased potassium excretion. The clinical manifestations of weakness, palpitations, and peaked T waves on the EKG are classic signs of potassium levels exceeding the normal range of 3.5 to 5.0 mEq/L. High potassium disrupts the electrical conductivity of the heart, causing rapid repolarization that appears as peaked T waves. Choice B rationale Hypokalemia is unlikely in this scenario as the symptoms and EKG changes do not match. Low potassium, usually below 3.5 mEq/L, typically presents with flattened T waves, the presence of U waves, and muscle cramping or paralysis rather than peaked T waves. The ingestion of large doses of NSAIDs specifically risks renal-induced potassium retention rather than loss. Therefore, the nurse would not prioritize hypokalemia as the primary concern given the patient's specific cardiac presentation. Choice C rationale Hyperphosphatemia occurs in renal impairment but does not typically cause peaked T waves or immediate palpitations. While phosphorus levels above 4.5 mg/dL can lead to long term bone issues and calcium imbalances, the acute cardiac rhythm changes described are much more characteristic of potassium imbalances. The nurse should monitor phosphorus if renal damage is suspected from the Ibuprofen, but it is not the most immediate threat to the patient's cardiac stability here. Choice D rationale Hypercalcemia generally causes a shortened QT interval and possible bradycardia, rather than the peaked T waves associated with hyperkalemia. Symptoms of high calcium, which is above 10.5 mg/dL, often include constipation, kidney stones, and lethargy, which do not align with the palpitations and specific EKG findings noted in this client. While Ibuprofen affects the kidneys, its most immediate and dangerous electrolyte effect in this clinical context is the elevation of potassium.