I was prescribed Norvasc in March 2008. I was given the generic form. Shortly after I developed an internal tremor through my entire body. I also have this horrible pressure in my head. In May the tremors, which strike at night when I am laying down, became visible. They don't feel like they are in my head, but they are everywhere else. Everyone says that they feel like a vibrator. They are very fast and last as long as I lay down. In the past 3 weeks I have started to experience the tremors during the day. I have read that norvasc can cause tremors. Does anyone have any ideas as to what could be going on? Thanks in advance to anyone who responds.