Losartan
"Bad medicine!!! Guess I fall in the 1 percent!  Had taken Benicar for almost 4 years with no problems but due to insurance issues doctor decided to switch me to losartan. After first week had so much pressure in chest and head thought I was going to explode, left leg  started to retain fluid while at work.. Didn't take the next day and contacted doctor who immediately got me in to see him. Borderline EKG results...low heart rate...BP horribly high. Now a stress test and eco cardiogram scheduled asap to rule out a heart attack. What!?! I'm a healthy 49 year old landscaper of 28 years who works out at least 3x a week and the medicine they put me on might have given me a heart attack???  Please be aware of any new medication!"