Metoprolol
"I've been taking metropolol for alomst 2 years to control heart PVC's (premature ventricular contractions) and it's worked great! I take 25mg 3 times a day. Many people have PVC's but I used to feel mine and they would scare me, like a sudden gush of blood through my heart or an extra thump. I've had no side effects with this medicine except that the afternoon pill can make me sleepy. But since I'm at work, I usually drink 1 diet coke, or 1 cup of coffee in the afternoon to offset it. Otherwise I only drink decaffeinated beverages the other parts of the day. Just that one boost of caffeine in the afternoon will offset the sleepiness of the metoprolol. I'm a 46 year old female that smokes."