Gabapin 100 tablet is an anti-seizure medicine. It contains gabapentin as its active ingredient. Gabapin 100 tablet is used with other medicines for controlling seizures (fits). It is also used for neuropathic pain (pain due to damaged nerves). Gabapentin in this medicine acts by decreasing abnormal excitement in the brain and changing the way the body senses pain signals. The dose, frequency and duration of the treatment of this medicine will be decided by your doctor. Take this medicine as prescribed by your doctor for the prescribed duration.