I took Losartan for 3 wks in Oct 2015. I developed a heart block so I stopped taking it and my heart returned to normal in 5 days. Within the next 9 months, I had heart block again 3 times, but then I became symptomatic so I had to have a pace maker or risk sudden death or ??? Has anyone else had heart block issues after taking Losartan?? Health professionals said it probably wasn't it, but I researched it and found that it does cause this. If you've it, have you reported it to the FDA??? If not, please report it. They need to know so they can let health professionals know.