A patient with a recent onset of nephrosclerosis has been taking an angiotensin- converting enzyme (ACE) inhibitor and a thiazide diuretic. The patient's initial blood pressure was 148/100 mm Hg. After 1 month of drug therapy, the patient's blood pressure is 130/90 mm Hg. What action will the provider take to address the patient's blood pressure?
a. add a calcium channel blocker to this patient's drug regimen
b. lower doses of the antihypertensive medications
c. order a high-potassium diet
d. add spironolactone to the drug regimen.
