I took 600mg of Neurontin 3x a day. I started to get gas during the 5 years I was on the pills. At 1st, I only took the pills 2x a day and it wasn't terrible. Later I had to start taking the pills 3x a day and after my 2nd meal of the day, I would get intestinal pain, bloating, and gas! It didn't seem to matter what I ate. My doctor gave me a zillion tests and could never find the cause of the problem. I had surgery for my neck 3 weeks ago and was weaned off of the Neurontin. For 3 weeks now, I haven't had nay of the gas!!! It was the Neurontin all the time. I am so glad to be off of the Neurontin.