I am diagnosed with BP II. Take 500 mg Lamictal. As I gradually increased the dosage of Lamictal, I would have very vivid and violent dreams. But I've been on my current dosage for about a year, and the dreams have all but disappeared. Until last night. And I don't even know if last night was really dreaming. I'm worried I might have been experiencing hallucinations. It's been very hard to differentiate between reality and "dream." I know there were times I was awake. All of it was so realistic. I honestly thought everything I experienced was real. I had to check with my fiance to help decide what was real and what wasn't. It's very discincerting and a little scary. The one thing that I did differently was take something OTC that contains diphenhydramine hcl. I am wondering if that contributed to this incident. Has anyone experienced such interaction between Lamictal and diphenhydramine?