I have had the same problem for years. I would hit my husband, wake up screaming and feel my heart pounding, and sometimes jump up and run. I wore a heart monitor to see if I was having heart or breathing problems. Even though I had several "episodes", the monitor recorded nothing. My doctor prescribed 10mg of Paxil. After one week on the medicine, I have had no problems. He told me I was having panic attacks while sleeping. Our brains switch modes when we fall asleep and different chemicals are produced. I'm doing great and can't believe how such a little pill can help me. It's also helped my husband able to sleep with me. He was growing very tired of having to deal with me every night in a state of terror!