A client presents to the clinic for a 1-month follow-up appointment. The client tells the nurse, "I have been taking chlorothiazide for a month and now I have leg cramps and feel tired all the time." What will the nurse consider as the most likely cause of the client's symptoms?

A. Hypercalcemia: Chlorothiazide, a thiazide diuretic, is more likely to cause hypocalcemia (low calcium levels), not hypercalcemia. Although calcium levels should be monitored, the symptoms described are not typically associated with hypercalcemia. B. Hyponatremia: Hyponatremia (low sodium levels) is a possible side effect of diuretics, but it typically causes symptoms like confusion, nausea, and headache rather than leg cramps and tiredness. These symptoms are more often linked to potassium imbalances. C. Hyperchloremia: While chlorothiazide may affect chloride levels, hyperchloremia is not a common side effect. The symptoms of leg cramps and fatigue are more characteristic of electrolyte disturbances involving potassium rather than chloride. D. Hypokalemia: Thiazide diuretics like chlorothiazide increase the excretion of potassium, which can lead to hypokalemia (low potassium levels). Symptoms of hypokalemia include leg cramps, fatigue, and weakness, making it the most likely cause of the client’s symptoms.