Checked against the current FDA label, named clinical trials, and the sources listed on this site.
01Postherpetic neuralgia starts at 300 mg on day 1
Neurontin for postherpetic neuralgia starts at 300 mg on day 1. Day 2 is 300 mg twice a day. Day 3 is 300 mg three times a day. The dose may be increased up to 1800 mg per day given in three divided doses. An 800 mg tablet is a labelled strength.
Generic gabapentin 800 mg tablets, ninety count, October 2026. The GoodRx tablet table listed 800 mg x 90 at $104.59 average retail and $22.67 with a coupon on 19 July 2026. Price is the easy part: reduced kidney function lowers the maximum daily dose regardless of how many tablets are in the bottle. This site does not dispense.
Sources and how this letter was sealed
FDA / DailyMed Neurontin (gabapentin) capsules, tablets, solution.
PHN titration to 1800 mg/day; studies 1800-3600 mg/day without shown extra benefit above 1800.
Renal table by CrCl; t1/2 5-7 h vs ~52 h at CrCl <30; bioavailability 60/47/34/33/27% at 900-4800 mg/day.
Method in brief: open primary sources, annotate against the current FDA label,
countersign by Dr. Nora Lindqvist, MD, then seal with a dated review.
Full walk-through on the method page and
editorial standards.
How to cite this page - Vancouver style
Juvia Pharma Drug Reference. Neurontin 800 mg tablets follow creatinine clearance [Internet]. Stockholm: Juvia Pharma; 21 October 2026 [cited 2026 Aug 21]. Available from: https://juviapharma.com/letters/gabapentin/
Desk thread
Answers follow the U.S. Neurontin prescribing information.
Marta C., Gavle writes
What is the day-one dose for postherpetic neuralgia?
Desk reply
Neurontin for postherpetic neuralgia starts at 300 mg on day 1. Day 2 is 300 mg twice a day. Day 3 is 300 mg three times a day. The dose may be increased up to 1800 mg per day given in three divided doses. An 800 mg tablet is a labelled strength.
Heikki Laine, Joensuu writes
How does the dose build on days 2 and 3?
Desk reply
Neurontin for postherpetic neuralgia starts at 300 mg on day 1. Day 2 is 300 mg twice a day. Day 3 is 300 mg three times a day. The dose may be increased up to 1800 mg per day given in three divided doses. An 800 mg tablet is a labelled strength.
Oskar Lindqvist, Ornskoldsvik writes
What is the maximum daily dose on the label?
Desk reply
Neurontin for postherpetic neuralgia starts at 300 mg on day 1. Day 2 is 300 mg twice a day. Day 3 is 300 mg three times a day. The dose may be increased up to 1800 mg per day given in three divided doses. An 800 mg tablet is a labelled strength.
Berit Moen, Hamar writes
The bottle says 800 mg. Is that a real tablet strength?
Desk reply
Neurontin for postherpetic neuralgia starts at 300 mg on day 1. Day 2 is 300 mg twice a day. Day 3 is 300 mg three times a day. The dose may be increased up to 1800 mg per day given in three divided doses. An 800 mg tablet is a labelled strength.
Before you start, stop, or change any medicine mentioned above, run it past your prescriber or pharmacist - they hold your chart, this despatch does not. Desk notice.
