I wanted to add... I got chest pains when I increased the Neurontin by 300mg every 3 days, but I then switched to increasing it by 300mg every 7 days and it worked better! Some people, however, are fine increasing it faster (I'm not one of them ).

I haven't experienced any extra weight gain from the Neurontin, and I tolerate it well (other than the chest pain experience), and I am now taking 2700mg each day.