have noticed my resting heart rate runs mostly in the 90's sometimes 100 to 110 beats per minute. I told my doctor and she recommended I take 50mg. My blood pressure is perfect but my resting heart rate is always in the 90's etc... I do get some SOB but never dizzy or feeling like I am going to pass out. When I work out on the treadmill I actually feel better. My heart rate on the treadmill never goes above 130. What say you?