After reading the side effects listed by other people, I realize many of my health problems may be related to Vytorin. I've been taking it for about a year. Insomnia, anxiety attacks, bloating and nausea, hot and itchy back, sore and stiff hands are the major ones. Last weekend i was in the emergency room for an unexplained right side pain that was excruciating (like being stabbed by a knife over and over again). All the tests revealed nothing but a higher white blood count. After I went home, I experienced lesser pain for a week, then the ah ha moment - I stopped the Vytorin and the pain stopped and many other symptoms subsided.