Gabapentin is part of its own drug class, called gabapentinoids. Typical dosages range from 100 milligrams to 800 milligrams of the drug. Some inactive ingredients in the gabapentin tablets or capsules include: Lactose Talc Cornstarch Gelatin Colors such as FD&C blue no. 2, yellow iron oxide Titanium dioxide Poloxamer 407 Magnesium stearate Copovidone, cornstarch Candelilla wax Hydroxypropyl cellulose