I'm on both now (Gabapentin to help me sleep/PTSD and Lamictal for anxiety) and I'm having some weird side effects. One of the side effects of Gabapentin is excessive eating. I don't know if it's the mixture of the two drugs, but I get hungry and then can't eat. Nothing sounds good to me and when I do eat, I feel sick. I'm on 300mg of the gabapentin and working on the "starter kit" for Lamictal (it has three different dosages and you upgrade week by week to find the correct one). Has anyone else experienced weird side effects with these meds?