Getting irregular heartbeats on home bp monitor. recent physical showed no issues. is the potassium in losartan 25mg causing this. low heart rate 55. ?

The accuracy of home: monitors to assess rhythm is poor at best in particular at slow heart rates. The potassium in Losartan is less than what you get in a glass of OJ. Irregular heart beats can only truly be assessed with electrocardiography not pressure pulsemetry. I would suggest you ignore the monitor and continue your losartan as prescribed. Alert your health care provider if you have rapid heart beats.