A client with Parkinson's disease who is taking carbidopa/levodopa reports the urine appears to be darker in color. Which action should the nurse take?

Choice A reason: This is not a correct instruction for the nurse to provide to the client's caregivers. When using the discus, the client should breathe out slowly and gently away from the mouthpiece, not into it. Breathing out rapidly into the mouthpiece can cause the powder to disperse and reduce the amount of medication delivered to the lungs. The client should also rinse the mouthpiece with water after each use and dry it thoroughly.

Choice B reason: This is not a correct instruction for the nurse to provide to the client's caregivers. The discus is not intended for use during an acute asthma attack, as it does not provide immediate relief of bronchospasm. The discus is a combination of fluticasone, a corticosteroid that reduces inflammation, and salmeterol, a long-acting beta-agonist that relaxes the airway muscles. The discus is a maintenance therapy that should be used regularly to prevent asthma symptoms and exacerbations. The client should also have a rescue inhaler, such as albuterol, for quick relief of asthma attacks.

Choice C reason: This is not a correct instruction for the nurse to provide to the client's caregivers. Clients using the discus may experience increased blood pressure, not decreased, as a possible side effect of salmeterol. Salmeterol can stimulate the beta receptors in the heart and blood vessels, causing tachycardia, palpitations, and hypertension. The nurse should monitor the client's blood pressure and heart rate regularly and report any abnormal findings to the healthcare provider.

Choice D reason: This is the correct instruction for the nurse to provide to the client's caregivers. The discus should not be used more than twice daily, as it can increase the risk of adverse effects and reduce the effectiveness of the medication. The discus should be used once in the morning and once in the evening, about 12 hours apart, to provide optimal control of asthma symptoms. The nurse should teach the client and the caregivers how to use the discus correctly and safely, and to follow the prescribed dosage and schedule.

Choice A reason: This is not the laboratory finding that indicates that the medication has been effective. Serum ammonia level of 30 Mcg/dL (17.62 mmol/L) is within the normal range for adults, and it does not reflect the effect of sodium polystyrene sulfonate. Sodium polystyrene sulfonate is a cation-exchange resin that binds to potassium in the intestine and removes it from the body through the stool. It does not affect the ammonia levels in the blood, which are influenced by the liver function and the urea cycle. The nurse should monitor the ammonia levels for any changes, but it is not the goal of the medication.

Choice B reason: This is not the laboratory finding that indicates that the medication has been effective. Hemoglobin level of 13.5 g/dL (135 g/L) is within the normal range for females, and it does not reflect the effect of sodium polystyrene sulfonate. Sodium polystyrene sulfonate does not affect the hemoglobin levels in the blood, which are determined by the number and size of red blood cells and the oxygen-carrying capacity of the blood. The nurse should monitor the hemoglobin levels for any changes, but it is not the goal of the medication.

Choice C reason: This is the laboratory finding that indicates that the medication has been effective. Serum potassium level of 3.8 mEq/L (3.8 mmol/L) is within the normal range for adults, and it indicates that the medication has lowered the potassium levels in the blood. Sodium polystyrene sulfonate is used to treat hyperkalemia, or high potassium levels, which can occur in AKI due to the impaired renal excretion of potassium. Hyperkalemia can cause cardiac arrhythmias, muscle weakness, and paralysis. The nurse should administer sodium polystyrene sulfonate as prescribed and check the serum potassium levels regularly to ensure that they are within the normal range.

Choice D reason: This is not the laboratory finding that indicates that the medication has been effective. Serum glucose level of 120 mg/dL (6.7 mmol/L) is slightly above the normal range for adults, and it does not reflect the effect of sodium polystyrene sulfonate. Sodium polystyrene sulfonate does not affect the glucose levels in the blood, which are influenced by the carbohydrate metabolism and the insulin secretion and action. The nurse should monitor the glucose levels for any changes, but it is not the goal of the medication.