A nurse is providing teaching to a client who has hypertension and a new prescription for captopril. Which of the following instructions should the nurse provide?

Choice A reason: This is not a problem for a client who has hypertension and a new prescription for metoprolol, as metoprolol is a beta-blocker that can reduce the workload of the heart and improve the symptoms of heart failure.

Choice B reason: This is not a problem for a client who has hypertension and a new prescription for metoprolol, as metoprolol does not have any significant interactions with antibiotics or other medications used to treat pneumonia.

Choice C reason: This is a problem for a client who has hypertension and a new prescription for metoprolol, as tadalafil is a phosphodiesterase-5 inhibitor that can lower the blood pressure and cause hypotension when taken with metoprolol. The nurse should investigate further and notify the provider of the potential interaction.

Choice D reason: This is not a problem for a client who has hypertension and a new prescription for metoprolol, as metoprolol does not affect the blood glucose levels or the management of diabetes.

Choice A reason: Expecting to gain weight while taking this medication is not a correct instruction, as it may discourage the client from adhering to the treatment and may worsen the hypertension. Captopril is an angiotensin-converting enzyme (ACE) inhibitor that lowers the blood pressure by preventing the formation of angiotensin II, a potent vasoconstrictor. Captopril does not cause significant weight gain, but it may cause fluid retention or edema in some cases. The nurse should advise the client to monitor the weight daily and report any sudden or excessive increase to the provider.

Choice B reason: Not using salt substitutes while taking this medication is a correct instruction, as it may prevent the risk of hyperkalemia, a potentially life-threatening condition. Captopril may increase the potassium level in the blood by reducing the secretion of aldosterone, a hormone that regulates the sodium and potassium balance. Salt substitutes may contain potassium chloride, which may further elevate the potassium level. The nurse should advise the client to avoid salt substitutes and high-potassium foods, such as bananas, oranges, or tomatoes, and to have regular blood tests to check the electrolyte levels.

Choice C reason: Counting the pulse rate before taking the medication is not a necessary instruction, as it may not reflect the effect of the medication on the blood pressure. Captopril does not affect the heart rate significantly, but it may lower the blood pressure too much, especially in the first few weeks of treatment or after a dose increase. This may cause hypotension, dizziness, or fainting. The nurse should advise the client to monitor the blood pressure regularly and report any symptoms of hypotension to the provider.

Choice D reason: Taking the medication with food is not a correct instruction, as it may reduce the absorption and effectiveness of the medication. Captopril should be taken on an empty stomach, at least one hour before or two hours after a meal, to ensure optimal bioavailability. The nurse should advise the client to take the medication at the same time every day and to avoid skipping or doubling the doses.