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Gabapentin Dosage Guide

Gabapentin Dosage Guide

Gabapentin is available in various strengths, including 100 mg, 300 mg, 400 mg, 600 mg, and 800 mg. The usual dose ranges from 1,800 mg to 5,400 mg a day, however, this can vary due to the patient's condition and tolerance to the medication. If a satisfactory dose is achieved, it is advised not to increase this dosage. It is always best to keep to the lowest effective dose, so as to better tolerate the medication. Usually, a patient is started on the 300 mg dose.

When patients begin their gabapentin dosage plan, one tablet is typically taken at bedtime, and then this dosing schedule can be increased every three to five days, as shown below:

08:00 a.m. 2:00 p.m. Bedtime
Start 0 0 1 tablet
After 3 to 5 days 1 tablet 0 1 tablet
After 3 to 5 days 1 tablet 1 tablet 1 tablet
After 3 to 5 days 1 tablet 1 tablet 2 tablets
After 3 to 5 days 2 tablets 1 tablet 2 tablets
After 3 to 5 days 2 tablets 2 tablets 2 tablets
After 3 to 5 days 2 tablets 2 tablets 3 tablets
After 3 to 5 days 3 tablets 3 tablets 3 tablets
What is Gabapentin?

Recommended Dosage of Gabapentin

The terms 'dose' and 'dosage' have been used interchangeably for a while, however, these two terms often have contrasting definitions. A dose refers to a specific amount of medication that is taken at one time. On the other hand, the dosage is the prescribed administration of a specific number, amount and frequency of doses over a certain time. The dosage guides a drug regimen.

The gabapentin dosage will depend on several factors, which include:

  • Type and severity of the condition that is being treated
  • The age of the patient
  • Form of the medication that is being taken
  • Underlying medical conditions
  • Other medications that are being taken

It is common for the medical professional to start the patient on a low dosage and appropriately adjust this dosage, over time, to reach an amount that is right for them. In certain cases, the smallest dosage can produce the most optimal desired effects.

What is gabapentin and how much of this medicine can be safely administered at once?

Dosage for partial-onset seizures:

  • Adult dosage (ages 18–64 years) – 900 mg per day, which translates to 300 mg taken three times a day. A professional may increase the dose to 2,400 mg to 3,600 mg a day.

Dosage for postherpetic neuralgia:

  • Adult dosage (ages 18–64 years) - Starting dose should be 300 mg, with day two being increased to 600 mg. This translates to 300 mg, taken twice a day. Day 3 will be 900 mg (300 mg taken three times a day, spaced evenly). The dose cannot exceed 1,800 mg per day (600 mg taken three times a day).

Gabapentin for pain dosage:

  • Adult dosage (ages 18-64 years) - Starting dose should be 1,800 mg to 3,600 mg per day, split into three divided doses. This equals 600 mg, taken three times a day.
How does Gabapentin work

Gabapentin Ingredients

It is very important to read the label of the medicine when you buy painkillers in the UK. This ensures that the therapeutics do not have substances which you may be allergic to. It is also to ensure that the active pharmaceutical ingredient is present. This API is responsible for the medication's effectiveness. As much as the API is important, the medication's inactive ingredients are also equally as important. These ingredients serve many purposes, such as masking a bitter taste or promoting the absorption of the substance. They may also influence the overall appearance of the medication.

The ingredients of this medication will remain more or less the same, across all forms. Its inactive ingredients may vary to compensate for the medication form. However, this does not interfere with the mechanism of delivery in any way.

The ingredients present in this medication include:

  • The active ingredient, gabapentin. This can be present in varying strengths.
  • Inactive ingredients, lactose, cornstarch, talc, gelatin, titanium dioxide, FD&C Blue No. 2, yellow iron oxide, and red iron oxide. Some of these inactive ingredients may differ in certain strengths.

Although the inactive ingredients do not influence the medication's functions, it still has some important purposes, such as:

  • Binding agents
  • Preservatives to ensure the medication lasts long
  • Add colour or flavour
Gabapentin Dosage

Gabapentin Dosage Strengths

Neurontin and its generic are available in various strengths, which can be bought online. All these strengths are equally as effective, and it should be noted that a higher dose does not always equate to elevated results.

The gabapentin painkiller is available in these strengths:

  • 100 mg
  • 300 mg
  • 400 mg
  • 600 mg
  • 800 mg

The gabapentin dosage strengths that a patient is recommended depends on the severity of their condition and tolerance to side effects as well. Having various strengths of gabapentin available provides healthcare professionals with options, for different types of patients. Although patients take the same medication, their doses will not be the same.

Gabapentin Side Effects

Gabapentin and Alcohol

Gabapentin 300 mg is considered a safe substance when it is used as prescribed. However, it can have dangerous interactions with other substances, such as alcohol. In some cases, this combination could require medical attention. When you buy gabapentin online, you are exposed to mild side effects but these can disappear after a few days. However, the combination of alcohol, with this medication, may change the status of these side effects. When alcohol is consumed with this tablet, there is an increased risk of experiencing more severe side effects. This can lead to hazardous behaviours, such as falling asleep while driving.

The combination elevates gabapentin side effects, such as respiratory depression, increased sleepiness and hallucinations, which can be harmful to the user and others. This combination can also increase the addictive power of the medication, causing physical dependence. Combining alcohol and this gabapentin painkiller in concordance can lead to the following side effects:

  • Headache
  • Coordination problems
  • Cognitive issues
  • Anxiety
  • Nausea with or without vomiting
  • Light-headedness
  • Constipation or diarrhoea
  • Drowsiness
  • Fatigue

How does gabapentin work in reference to the above?

  • The action of this medicine is said to influence alterations in mood and certain cognitive functions but alcohol can do the same, so combining these substances can dramatically affect the thoughts, mood, and behaviours of some.
  • This may cause patients to display erratic behaviour, which can result in poor decision-making, and in some cases, the combination can also cause high levels of agitation as well as mania. Therefore, alcohol and this medication should be avoided at all costs.

As well as the strongest painkillers on the market, we also sell a wide range of strong sleeping pills and anxiety medication at without a prescription! If you have any questions, please contact us for an informative reply. We look forward to helping you with a pain relief option.




Quickly establishing herself as a content writer Sarah found herself drawn to the medical industry – specifically in the field of Cognitive Behavioural Therapy (CBT-I), and sleep aids for insomnia. Sarah brings a wealth of experience, expertise and enthusiasm and will no doubt keep our readers absorbed with her insightful and thoughtful blogs written especially for

Henry Martin – May 12, 2021
Hi Sarah, I have been dealing with nerve pain for the last 12 months. Your informative article has helped me with the management of my condition and how to get the best out of my medication. You have definitely aided my recovery. Henry Martin

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