I started taking diclegis a few weeks ago and didn't put it together that it was what was causing my crazy nightmares until my lips went numb and I googled diclegis side effects and saw nightmares on there. The nightmares were so real I couldn't fall back asleep and I'd have to call people the next morning to try and reassure myself it was just a dream. I hardly slept because of it. Immediately after stopping diclegis the nightmares also stopped. Just thought I'd post this so people taking it were aware of this potential side effect.