Which drug likely to cause skin eruption( 3bumps on leg size of pencil eraser) uribel( taking as needed and 150mg neurontin (gabapentin) 1x day for 9 months now?

Uribel & Gabapentin: Gabapentin would be more of the culprit than uribel though skin reactions are still much less common in general with gabapentin. Your skin eruptions are so very localized. I would expect to gabapentin to have caused a more diffuse skin reaction. Skin biopsy will give you more clarity. I would be surprised if your biopsy shows a direct link to gabapentin since you've been on it for 9 months.