The rule of thumb with Gabapentin is that the max your body can even process is 3200mg within a span of 8-10 hours (I'm guessing on the hours, it could be for the day). If you start to go overboard and use more than that, you will not get higher, you will actually start to face some adverse effects from the drug, like getting angry or emotional, diarrhea, all bad stuff. I used to use them all the time when I was living in a halfway house because they cannot drug test for them unless they send your urine out for an expensive lab test, which I have only seen done a handful of times over the past couple of years of being in and out of programs. So to answer your question, go with about 2000-2500mg and kind of stick to that. Personally, I have never noticed any difference between the 2000/2500 mark and the 3200mg max. Anything over that you will just be shitting your brains out and getting agitated easily and you will notice that happening if you overdo it for long enough. I imagine that it cannot be good for your liver to be doing that either.