Buying Gabapentin online safely, and secure home delivery. Steps to verify the legitimacy of online pharmacies(Medznow.com). Gabapentin is a prescription medication commonly used to treat nerve pain and seizures. It works by stabilizing electrical activity in the brain and affecting the way nerves send messages to the brain, thereby reducing pain and discomfort. It comes in different dosages like 100mg, 300mg, 400mg, 600mg, 800mg, 1200mg, and 1600mg.