When caring for a client diagnosed with hypernatremia—characterized by a serum sodium level greater than 145 mEq/L—proper intravenous fluid (IVF) selection is critical to safely correct electrolyte imbalances without causing additional complications. Hypernatremia often results from water loss or sodium gain, leading to cellular dehydration and requiring careful management to restore fluid balance. The intravenous fluid choice must provide free water to dilute the elevated sodium concentration without adding excess sodium that could worsen the condition. Among the common IV fluids, Dextrose 5% in water (D5W) is particularly suitable because it supplies free water after the dextrose is metabolized, thereby lowering serum sodium levels gradually and safely. Unlike isotonic saline solutions, D5W contains no sodium, making it the ideal maintenance fluid in hypernatremic patients. Hypertonic saline solutions like 3% saline and isotonic fluids such as 0.9% saline or Lactated Ringer’s contain sodium and should be avoided or used with caution in hypernatremia management. Administering hypertonic saline can exacerbate hypernatremia by increasing the sodium load, while isotonic fluids do not provide the free water needed to correct the deficit. Lactated Ringer’s also contains electrolytes like potassium and calcium, which may complicate the electrolyte imbalance. Effective volume replacement with appropriate fluids must also consider the patient’s overall clinical status, including the presence of comorbidities and renal function, to avoid fluid overload or rapid shifts that can cause cerebral edema or other serious consequences. Regular monitoring of serum electrolytes, osmolality, and neurological status is essential during treatment. Education on the signs of fluid imbalance and adverse reactions helps nurses ensure patient safety and optimize outcomes. NCLEX questions such as this allow nursing students to understand the practical implications of fluid choice in electrolyte disorders. Utilizing practice questions and detailed rationales strengthens clinical reasoning required for safe nursing care. Access to comprehensive question banks and guided explanations enhances readiness for NCLEX and professional nursing practice.