Gabapentin is an anti-convulsant medication used to treat partial seizures. It's also taken for nerve pain, which different conditions, including diabetes and shingles, can cause. It also helps with anxiety, headache, leg pain or other pain. Headache is a common side effect of Gabapentin. Heart attack i the severe side effect of gabapentin. It does not have an Rx factor. For more information visit our below link.