Diltiazem
"I am a 69 year old male , 6'4" currently about 210 #.About six months ago experienced afib when first diagnosed was given Metoprolol and within a few days was extremely weak and could hardly breath.  My cardiologist changed to diltiazem and it was like night and day.  I had plenty of energy and the breathing issues ended.  Since being diagnosed with afib I have stopped drinking alcohol, began a low carb diet that includes lots of vegetables, protein and omega 3s. All in all a pretty healthy diet. I also have lost about 30lb in that time period.  At my 6 month Doctors check up prior to meeting with my cardiologist I commented about discomfort in my breasts, and was diagnosed with Gynecomastia. Fasting blood sugar 104 to 132. Concerned"