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Updated on 24 Apr 2024

gabapentin Uses, Side Effects, Interactions, Warnings & Dosing

What dosages is gabapentin available in?

What dosages is gabapentin available in?

gabapentin is available as a 100 mg, 300 mg, and 400 mg oral capsule, 250 mg/5 ml oral solution, and a 300 mg, 600 mg, and 800 mg oral tablet.

What is gabapentin used for?

What is gabapentin used for?

gabapentin is an antiepileptic and is used for the following:

  • Nerve pain from shingles in adults
  • Add on treatment for partial (focal) seizures in people age 3 years and older
How does gabapentin work?

How does gabapentin work?

gabapentin is an antiepileptic that’s also used to help with nerve pain. It has a similar structure to gamma-aminobutyric acid (GABA), a chemical in the brain that calms nerves. It’s not completely known how gabapentin works to treat seizures or nerve pain, but it’s thought to work by lowering the activation of nerves involved with causing nerve pain and seizures.

How do I take gabapentin?

How do I take gabapentin?

The dose of gabapentin is the same for the tablets, capsules, and liquid.

Nerve pain from shingles

  • Adults: The typical starting dose is 300 mg by mouth once daily on Day 1, then 300 mg twice daily on Day 2, and then 300 mg three times daily starting on Day 3 and onwards. Your provider might raise your dose depending on your response. The maximum dose is 600 mg three times daily

Partial seizures

  • Adults and children age 12 years and older: The typical starting dose is 300 mg by mouth three times daily. The typical maintenance dose ranges from 300 mg to 600 mg by mouth three times daily
  • Children age 3 to up to 12 years old: Your child’s provider will determine your child’s dose based on their age and weight. The typical starting dose ranges from 10 mg/kg to 15 mg/kg daily, divided into three smaller doses and taken by mouth throughout the day. The typical maintenance dose ranges from 25 mg/kg to 40 mg/kg daily, divided into three smaller doses and taken throughout the day

Your dose might be different if you have side effects.

Is it safe for me to take gabapentin?

Is it safe for me to take gabapentin?

gabapentin is a safe and effective treatment when used for FDA licensed indications. However, like all medications, they may give you unwanted side effects. You should always discuss potential side effects with your physician to ensure the medication is suitable and right for you.

gabapentin Common Side Effects

gabapentin Common Side Effects

Common side effects of gabapentin:

  • Dizziness
  • Sleepiness
  • Poor muscle control/clumsiness
  • Fatigue
gabapentin Serious Side Effects

gabapentin Serious Side Effects

Serious side effects are rare with gabapentin. Contact your healthcare provider immediately if you experience any of the following.

  • Serious allergic and skin reactions: hives, rash, blisters, fever, swelling of the lips or tongue, difficulty breathing, skin reddening
  • Suicidal thoughts or behaviors
  • Breathing problems
Effects of other drugs, drug classes and over-the-counter products on gabapentin

Effects of other drugs, drug classes and over-the-counter products on gabapentin

The following medications may interact with gabapentin:

  • Concentrations increased by morphine; may need dose adjustment
Who makes gabapentin?

Who makes gabapentin?

Various FDA-approved generic manufacturers

Is gabapentin safe in pregnancy?

Is gabapentin safe in pregnancy?

It is not known if gabapentin can harm your unborn baby. Tell your healthcare provider right away if you become pregnant while taking gabapentin. You and your healthcare provider will decide if you should take gabapentin while you are pregnant. Pregnancy Registry: If you become pregnant while taking gabapentin, talk to your healthcare provider about registering with the North American Antiepileptic Drug (NAAED) Pregnancy Registry. The purpose of this registry is to collect information about the safety of antiepileptic drugs during pregnancy. You can enroll in this registry by calling 1-888-233-2334.


What to do if you missed your gabapentin dose

The FDA's medical product safety reporting program for health professionals, patients and consumers.

Learn more about reporting side effects
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Medical Disclaimer

NowPatient has taken all reasonable steps to ensure that all material is factually accurate, complete, and current. However, the knowledge and experience of a qualified healthcare professional should always be sought after instead of using the information on this page. Before taking any drug, you should always speak to your doctor or another qualified healthcare provider.

The information provided here about medications is subject to change and is not meant to include all uses, precautions, warnings, directions, drug interactions, allergic reactions, or negative effects. The absence of warnings or other information for a particular medication does not imply that the medication or medication combination is appropriate for all patients or for all possible purposes.

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