<qa>  What is the final dose of gabapentin?Patients will be randomized to receive gabapentin or placebo. The gabapentin dose will be titrated for persisting symptoms and as tolerated during the first 6 weeks of the study, reaching final doses between 1800 mgday and 2400 mgday. Patients will then continue on the final dose for the remaining 6 weeks of the study. Following completion of the 12 week treatment phase, patients will be tapered off of the medication over 1 week. 