I've been taking Neurontin for several years. I'm only on 900 mg a day. That is my max for it.

The "high" feeling lessens and you don't get that effect anymore.

How much are you thinking of increasing it by? I would discuss it with your dr 1st. I only increase during breakthrough pain and spinal flares by taking 600 mg in the am and 600 in the pm. I can only do that for a day or 2.