Despite a high dosage, a male patient who is taking nifedipine (Procardia XL) for antihypertensive therapy continues to have blood pressures over 140/90 mm Hg. What should the nurse do next?
- Assess his adherence to therapy.
- Ask him to make an exercise plan.
- Instruct him to use the DASH diet.
- Request a prescription for a thiazide diuretic.