On 10mg of Ambien along with 400mg Trazadone, I had no problem. Soon after upping me to 20mg of Ambien I thought I was having these weird dreams about stuffing myself with food and calling my sister and talking to her. It wasn't until the next time that I called her the next day that I mentioned the weird dream and she told me I did call her. Then my room mate confirmed that I had been getting up at night and gorging. The last straw was when I drove through a drive-thru at 1am for a special sandwich and I woke up the next morning realizing I had done that! I cut the Ambien in half, and went back to insomnia. What I found interesting is when I moved and requested my records, my psych had never documented the 20mg of Ambien he had prescribed.