Buy Gabapentin 800 mg online is used with other medications to prevent and control seizures.The most common dose for gabapentin is 800 mg, which is used in managing nerve pain as a result of diabetes or shingles, for example, and will act on the chemical activity in your brain in handling your pain so as to give deep relief to one who has chronic pain. Besides pain, this medication is used to control some types of seizures. Gabapentin (Neurontin, Gralise, Horizant) is a medicine used to treat partial seizures, nerve pain from shingles and restless leg syndrome.Gabapentin may also be used for other conditions as determined by your healthcare provider.