My Husband was in the Hospital for Ventricular Tachycardia (he has a pacemaker) and they put him on the Amiodarone drip for a few days, which helped. They gave him the full dose after he came off the drip that morning, but they never gave him the Metoprolol in the hospital. He took his first dose of the Metoprolol this evening at around 7:30pm and he felt fine until now (it is 1:00am). He's going on about how his heart is racing but he doesnt feel anything else, no chest pain, no shortness of breath. He's a little hot but other than that he says he feels fine. Could this be a side effect of the Metoprolol interacting with the Amiodarone, or could he have overexerted himself by going up the stairs too many times. He's basically been on 95% bedrest since Monday night and it is now Wednesday.