I am a 76 y.o. male in pretty good health. I have HBP which is controlled with HCTZ 25mg and lisinopril oral 20 mg. I also take terazosin 10 mg for BPH. I am 5 9 and weigh 207 lbs and continuing to lose weight. I use a C-PAP for sleep apnea and have occasional irregular pulse but am able to walk 2 miles at a brisk pace with no problem. I still have sexual desire but cannot attain erection sufficient for penetration. I feel the lisinopril and terazosin keep my BP low which prevents erection. Is it ok to stop the lisinopril and terazosin for about three days and take a low dose of viagra, levitra or cialis to help me achieve an erection sufficient to allow penetration?