What Causes Muscle Cramps While On Lisinopril And Flomax?

I am 59 old male. I have been treated with high blood pressure with a daily 5mg of lisinopril for 10 years. I also take flomax nightly for bph. I run 4 miles 5 days a week. I am 5 7 175 lb. I have experienced occasional muscle cramps. Usually in my thighs, but also under my right rib cage. Historically I have drank a lot of fluids. Powerade, decaf diet coke, unsweet decaf tea, 6-10 oz of coffee in morning before I run. (with 12 oz of diet coke and maybe a couple of drinks of powerade, pre run) Last week I experienced some fluttering in my chest, and light headedness. I went to the firestation and had the paramedic check my bp--- 136/73. I told him my story and he said I was dehydrated. I drank about 10 oz of water and my symptoms went away. Since then, I have drank mostly water through the day. (still 6-10 oz of coffee in morn before run) but I am drinking lots of water. Now I wake up 2x a night needing to urinate but also with a dry mouth. Also I have frequent bowel movements, many times very loose. Usually two bm s pre run. I have no shortness of breath, no chest pain, just this flutter. I feel very slightly weak or tingly in my legs.--basically I am just a little off my stride for lack of a better term.