I am 58 and have had PVC's since I was 25, though they never interfered with my lifestyle until recently. I was diagnosed with afib in July 2010 after a trip to the ER, followed by another trip to the ER for afib at the end of October, 2010. My ventricular heartbeat was about 180 per min, but Cardiezem restored me to normal rhythm in about an hour the first time, but it took about 6 hours the second time to get me back in a normal rhythm. I was put on 120 mg Cardiezem/day + 325 mg aspirin after the first incident. My dose of Cardiezem was doubled to 240 mg/day about 3 weeks before I had second afib incident in October. The cardiezem did not seem to help as I had taken a dose 1 hour before my afib actually began. I was struggling with side effects from Cardiezem and asked to have my medicine changed, so I was put on 50 mg Metroprolol Tartrate per day, but began to suffer some nasty side effects--headaches, dizziness, nausea, abdominal cramps, lucid dreams, runny nose, and my heart rate dropped from 75-85 bpm to 45 to 55 bpm's depending on what I was doing. When I would sleep it dropped into the low 40's, and I couldn't focus at work, couldn't exercise. Went to ER two more times in Feb 2011 for deep chest aches, which turned out to be costochrondritis (chest wall inflammation), cause unknown. I asked my cardiologist about reducing the dose of metoprolol to help alleviate some of the side effects I was having, and so we knocked it back to 25 mg/day (one 1/2 tablet 12 hrs apart) over the past couple weeks. The last two weeks, I developed a severe headache and neck aches, which were constant, and I was taking 2 extra strength Tylenol along with 1 Ibuprofen every 4-6 hours for the last couple days to try and stop them (recommendation from my internal medicine doctor). That seemed to help but frankly was scared about all the pills I was taking. Saw my cardiologist again and he told me to quit taking the Metroprolol within the week due to side effects it was causing. Now I notice I am getting heart palpitations throughout the day, some are so strong they cause my chest muscles to contract suddenly. Am also struggling with spells of dizziness and light-headedness along with adrenalin flushes that seem to come and go. Can going off of metroprolol be causing them? Once off the metroprolol will they lessen? Can 325 mg per day of aspirin be causing them or aggravating them? Thank you! These past 8 months have been pretty tough.