I'm a 63 yr old male, and started hypertension about a decade ago. Took Lisinopril, which knocked my systolic down from the 160s to the 140s for awhile. Recently, even with Lisinopril, was spiking close to 200. New Dr. added HCTZ (diuretic) which got it back under 150, but the 2 together make me ongoingly fatigued, and dizzy upon standing up. The new doc, nor anyone else, knows why I have such high BP.