Do not take GRALISE if you are allergic to gabapentin or any of the ingredients in GRALISE. Do not change your dose or stop taking GRALISE without talking with your healthcare provider. You should know: The answer above provides general health information that is not intended to replace medical advice or treatment recommendations from a qualified healthcare professional. Gabapentin comes as a capsule, a tablet, an extended-release (long-acting) tablet, and an oral solution (liquid) to take by mouth. Gabapentin capsules, tablets, and oral solution are usually taken with a full glass of water (8 ounces [240 milliliters]), with or without food, three times a day. Gabapentin (Neurontin, Gralise, and others) is a prescription drug used to treat seizure disorders and nerve damage from shingles. Off label uses (non-FDA approved) include fibromyalgia, headaches, and hot flashes. Common side effects are fatigue, nausea, hostility, dizziness, and tremors. Gabapentin is used to treat some types of seizures and for postherpetic neuralgia (nerve pain caused by shingles). Learn about side effects, interactions and indications. Warning: Right now, Gabapentin is approved in the United States to treat seizures. There are not a lot of comprehensive studies that look at Gabapentin as a way to treat anxiety, mood disorders or tardive dyskinesia. Gabapentin is a prescription drug most commonly prescribed to relieve nerve pain following shingles in adults, treating the pain of post herpetic neuralgia. Learn about side effects, drug interactions, dosages, warnings, and more. Gabapentin is primarily eliminated unchanged by the kidney. Therapy with gabapentin should be administered cautiously in patients with impaired renal function. How to use Gabapentin Tablet, Extended Release 24 Hr. Read the Medication Guide provided by your pharmacist before you start taking gabapentin and each time you get a refill. Gabapentin side effects in dogs. While most of the gabapentin side effects in dogs are limited to mild sedation and ataxia, there are a number of more serious side effects that are associated with exceeding the recommended dosage.