What is the normal range for serum sodium levels?

The normal range for serum sodium levels is 135-145 mEq/L. Sodium is a key electrolyte in maintaining fluid balance, nerve function, and muscle contractions within the body. Levels below 135 mEq/L indicate hyponatremia, which can lead to symptoms such as confusion, seizures, and even coma if severe. Conversely, levels above 145 mEq/L suggest hypernatremia, which can cause similar neurological symptoms and indicate dehydration or excessive sodium intake.

Understanding the normal serum sodium range is crucial for assessing fluid and electrolyte balance in patients, guiding treatment plans appropriately, and preventing complications associated with abnormal sodium levels. In clinical practice, maintaining sodium levels within this range helps ensure optimal physiological function and health.