Diltiazem
"I have taken this for over a 18 months. It works great. I have Atrial Fibrillation and Tachycardia. I had previously taken Rythmol for six months - it added 20 pounds to me and I was eating less and less. The diltiazem is working great, started on 120mg but just recently went to 180mg. Having a few more episodes but am also dealing with breast health issues - it could very well be from anxiety from this rather than actual heart issues. Very hard to discern. Would recommend this over Rythmol - hands down, and in the last 6 months have lost 10 of the 20 Rythmol put on me."