Gabapentin 300 mg medicine is the first choice for pain relief. For the most benefits, Gabapentin must be used as per the prescription. Gabapentin 300 mg is a widely used and often first-line medication for neuropathic pain (nerve damage pain), but it is not a universal "faster" pain reliever for all types of pain. It is primarily effective for specific conditions like postherpetic neuralgia and diabetic neuropathy, and it typically requires a gradual dose increase over several weeks to reach its full effect.