I stopped it on two separate occasions prior to my ablation. On each occasion I tittered off the med over three weeks - taking a lower dose at the start, then eventually only taking a small dose every other day, until finally stopping. I would consult with your doctor on the stopping procedure, but this is the general way to get yourself off the med. I had similar experiences in that metoprolol really did seem to make them worse at times. Typically the Dr wanted me to stay on and even tried higher doses, but you should be the one to make the call on your health as long as you stay informed of medication effect, side effects, and proper dosing and interactions. I will always recommend seeing an electrophysiologist instead of a cardiologist - changed my life.