I had a bladder infection & was put on Cephalexin 500 mg. I am also on two different blood pressure medications. Ever since i started this medication my blood pressure is too high. My doctor changed one of my blood pressure medications to Losartan Potassium 100mg. But my blood pressure is still to high. This is my last day of Cephalexin. I didn't have this problem before I started this Cephalexin. I have been on blood pressure medication since I was 30 years old & now 71.