--though I'm sorry you haven't been able to get much relief.

For what it's worth, 100mg of Neurontin is a TINY dosage, especially for someone your size. Most doctors/neurologists will start at low dosages, due to the side effects (typically, as with many anti-seizure drugs, fogginess, lethargy, fluid retention, weight gain) and ramp up with time as one becomes acclimated to these--but I suspect that at your size you may not even be experiencing that on that dosage.

Neurontin is used for a variety of neurological pain and seizure conditions, but it may only be effective for somewhere around to a third of half of all patients. Still, you could try a dose gradually raised over days. I know of people with MS, peripheral neuropathy, etc., who have gone as high as 4800mg/day and still gotten some additional relief with each ramp-up, though the drug availability does tend to be reduced at higher levels (i.e., a jump from 300 to 600mg/day tends to be more noticeable in effect than one from 900 to 1200, and so on).

At my highest, I was up to 2700mg/day to control my very painful full-body small-fiber neuropathy. I started with 300mg/day, and I weighed about 190 at the time--I did notice an immediate effect but did not get 'full" effect until I was taking 800mg three times each day. Each ramp up did involve a bit of getting used to as side effects would ramp up as well, but fortunately these would subside back to more "baseline" levels in several days. (When I came down in dosage from the drug I did it VERY slowly, as one is supposed to with anti-seizure meds to prevent rebound effects--I would come down about 100mg each week; it took me several months to come off it completely.)

Often, meds such as neurontin are prescribed with an small dose of anti-depressant such as Elavil, in that for many these meds have a synergistic effect.

We do have a meds forum here where you can look for more info:

http://neurotalk.psychcentral.com/forum72.html