Hi! Caucasian female, 46, hx Systemic Lupus. SEVERE adverse reaction to Chlorthalidone, now adverse reaction to Lisinopril. BP is labile, usu low 100's over 60's diastolic but occas skyrockets to 190's over 100's diastolic with severe pain or stress. Should next BP drug be ARB? Dr has Rx Nifedipine. Frankly, I'm worried.