So I take 20 mg of Zyprexa (olanzapine) every night at bed time, along with 20 mg of Prazosin, 200 mg of Trazodone, and 1 mg Lunesta. I take 5 mg of Zyprexa in the morning to help with the anxiety I wake up with as a result of all the nightmares. I've gained almost 20 pounds in the last three months. This last week, I actually lost a couple pounds, but I have worked out for at least two hours every day. My problem isn't extreme – I needed those 20 pounds, as I was pretty underweight….