A patient is receiving medication to increase urine output. The patient's urinary output increases significantly and the blood pressure decreases slightly. Which type of side effect is a decrease in blood pressure?.

Choice A rationale: A decrease in blood pressure is a common side effect when a medication increases urine output, as the reduction in fluid volume can lead to lower blood pressure. Choice B rationale: While a decrease in blood pressure might be desired in certain conditions (like hypertension), in this context it is a side effect, not the primary desired effect. Choice C rationale: The therapeutic effect of the medication in this case is to increase urine output, not to decrease blood pressure.