atrial fibrillation
"I was on Cartia XT when they discontinued it.  It is the ONLY drug that works for me.  There was no warning from CVS either.  I went into fibrillation.  The doctor put me on four different drugs after that of which none worked.  One was too hard and large to swallow, one had food dye and I am allergic, and one made my head ring terribly.  Another one is on the way but it is twice a day.  Since I also have fibromyalgia, I have to be extra careful. "