started when drug store changed manufactures on my perscripitions of metoprolol and lisinopril, I have changed pharm. 2 times, no change in the symptons. dr. changed me to losartan , no change. recently changed pharm. again,to go with another manufacturer, now i have bigger blisters, and clusters of blisters. Cardiologist insisted it is not my meds. and does'nt want to change them.