Gabapentin is an FDA-approved medication used to treat epilepsy. Gabapentin is available in different variants: Gabapentin 100 mg, 300 mg, 400 mg, 600 mg, 800 mg, 1200 mg, 1600 mg. It is also helpful for nerve pain, restless leg syndrome, and partial seizures. It can work as a chemical messenger for the brain. Gabapentin can be taken with water and with or without food. Store gabapentin at room temperature and dry place. Gabapentin side effects are vision changes, clumsiness, unsteadiness, dizziness, drowsiness, and sleepiness.