I am presently taking medication for hypertension. My primary physician discontinued my Lisinopril because I complained about a chronic cough. She increased my Metoprolol 25 mg to 50 mg. I have noticed that my BP has become more eratic instead of the regular and consistent 110/70. My heart seems to be pounding at night and I am concerned about the change. I called my doctor and voiced my concern and my doctor prescribed losartan potassium 100 mg and decreased my metoprolol to 25 mg as I was taking earlier. I looked online and saw that losartan was given in 20, 40, and 100 mg. I don t understand why I have to start at the very highest dosage and somewhat sceptical of her reasoning. I decided to just continue to take the metoprolol 50 mg until my next visit. I no longer trust her. Could you help me to understand about this medicine change. I have also requested to change physicans to an Internist.