https://medznow.com/pain-relief/gabapentin-100-mg/ gabapin 100 tablet is an anti-seizure medicine containing gabapentin as its active ingredient. This tablet is used with other medicines to control seizures (fits) and neuropathic pain (pain due to damaged nerves). Gabapentin Gabapin acts by decreasing abnormal excitement in the brain and changing the way the body senses pain signals