Gabapentin, sold under the brand name Neurontin among others, is an anticonvulsant medication used to treat partial seizures, neuropathic pain, hot flashes, and restless legs syndrome. Manufacturer advises reduce dose to 600‒1800 mg daily in 3 divided doses if creatinine clearance 50‒79 mL/minute. Manufacturer advises reduce dose to 300‒900 mg daily in 3 divided doses if creatinine clearance 30‒49 mL/minute. 2.1 Dosage for Postherpetic Neuralgia. In adults with postherpetic neuralgia, NEURONTIN may be initiated on Day 1 as a single 300 mg dose, on Day 2 as 600 mg/day (300 mg two times a day), and on Day 3 as 900 mg/day (300 mg three times a day). Medscape - Seizure dosing for Neurontin, Gralise (gabapentin), frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy & lactation schedules, and cost information. Gabapentin enacarbil is a white to off-white crystalline solid with a melting onset of approximately 64°C and a solubility of 0.5 mg/mL in water and 10.2 mg/mL in phosphate buffer (pH 6.3). Gabapentin comes in capsule form, as a regular or extended-release tablet, and as a liquid. A typical adult dose for postherpetic neuralgia usually starts at 300 milligrams (mg), and your doctor. Initially, 300 mg PO 3 times per day. May increase using 300, 400, 600, or 800 mg dosage forms PO given 3 times per day. Effective dose is 900—1800 mg/day, but up to 2400 mg/day has been used long-term. Yes, You are in withdrawal of the Lyrica. I sure hope you have not just stopped it and are on a wean down dose. Gabapentin. I really feel the Dr push this drug on us because they are tired of turning their patients into addicts. 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. My doctor also prescribed 100mg gabapentin for my shingles, but told me to increase the dosage to 200mg the following week and the third week take 200mg.