A patient with a sodium level of 114 mEq/L is most likely to develop

Hyponatremia

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A patient with a sodium level of 114 mEq/L is most likely to develop seizures, which are a manifestation of severe hyponatremia and cerebral edema. Hyponatremia is a low level of sodium in the blood, which can cause water to move into the brain cells and cause them to swell. This can lead to increased intracranial pressure, neurological dysfunction, and seizures. Seizures are a medical emergency and require prompt treatment to prevent brain damage or death. Tetany, flaccid paralysis, and cardiac arrhythmias are not typical signs of hyponatremia, but may occur in other electrolyte disorders, such as hypocalcemia, hyperkalemia, or hypokalemia.

References:

Overview of the treatment of hyponatremia in adults - UpToDate1, p. 1-2.

Manifestations of hyponatremia and hypernatremia in adults - UpToDate2, p. 1-2.