Yesterday I had a consult with an electro physiologist in Kingsport Tennessee. After reviewing my records & spending quite a bit of time with me, he suggested that I take this drug for 21 days (if I can tolerate it )then return on February 5 for cardioversion. Agreed and started the drug yesterday evening. Today I feel like I’m in a funk. Woke up with a headache and my neck hurting. These are some of the side effects that are listed, but there are many more. Has anyone here taking this drug and had success in getting their heart to back into rhythm?