For Nuropathic discomfort, Gabapentin is an older generation medication. The newer medication is capsule Pregabalin. It has less side effects and better action to relieve the nuropathic parasthesia. The dose is determined depending on many factors, like degree of nuropathy, age, any other medication you are taking. In proper dosages, it usually gives very good relief in 3 to 4 weeks. However, it should be generally taken for a period of 3 to 5 months or more, for complete relief of the problem. You can consult a Neurologist or Podiatric surgeon for the dosages of the medicine appropriate for you.