A nurse from the adult medical unit is pulled to the geriatric unit. The nurse notes that many of the common medications provided are in lower doses than typically prescribed. What action by the nurse is the highest priority?

Notify the charge nurse that patients may have received inappropriate medication dosages.

Evaluate the laboratory values of each patient to determine liver and kidney function as a possible reason for decreased dosages

Do not worry about the discrepancy because this is not the nurse's unit.

Call the nursing supervisor to investigate the nurse's concerns.