I have been prescribed 300 mg of gabapentin a day and 10 mg of valium twice a day, the PA stopped me off of xanax cold turkey after being on it for 15 years. I was also put on lamotrogine 3 years ago 100 mg, with no explanation as to why. i have severe insomnia and panic attacks and agoraphbia. I have been taking all 3 gabapentin at night plus one valium to try to sleep. i have nightmares, vivid dreams and panic attacks in the night. I am very agitated and depressed all the time, along with anger, which I have never had. please help me.