premature ventricular depolarizations
"I'm a 72 year 'young' female, and I have been taking Metoprolol Tartrate for 7 years, for PVC's Premature Ventricular Contractions of my heart, and also for Tachycardia. I take 25mg. in the morning, and 25mg. about 11 hours later. The medicine has stopped my PVC's, and also slows down my heart rate. When I first started taking Metoprorlol Tartrate, it made me very tired, but after about 2 weeks, my body got used to it, and I was fine."