A 32-year-old woman comes to your obstetrics clinic for preconception counseling. She has a history of hypertension and hypothyroidism for over four years. She takes lisinopril 10 mg daily for hypertension and synthroid 50 mcg for hypothyroidism. Her temperature is 99 °F (37.2 °C), heart rate is 92 beats/min, blood pressure is 142/94 mm Hg, respirations are 19 breaths/min, and oxygen saturation is 97% on room air. She has no medical complaints today. Her physical examination is unremarkable. Regarding the management of her hypertension during pregnancy, which is the most appropriate next step?
