Patient Leaflet Updated 25-Mar-2026 | Ipca Laboratories UK Ltd
Gabapentin Capsules
Gabapentin Ipca 100 mg Hard Capsules
Gabapentin Ipca 300 mg Hard Capsules
Gabapentin Ipca 400 mg Hard Capsules
Gabapentin
1. What Gabapentin capsules are and what they are used for
2. What you need to know before you take Gabapentin capsules
3. How to take Gabapentin capsules
4. Possible side effects
5. How to store Gabapentin capsules
6. Contents of the pack and other information
Gabapentin capsules belong to a group of medicines used to treat epilepsy and peripheral neuropathic pain (long lasting pain caused by damage to the nerves).
It contains the Gabapentin which belongs to a class of medicines called Gabapentinoids.
The active substance in Gabapentin capsules are gabapentin.
This medicine has been prescribed to you and should not be given to anyone else.
Gabapentinoids can cause dependence, tolerance and addiction, and you may get withdrawal symptoms if you stop taking it or reduce the dose suddenly. Your prescriber should have explained how long you will be taking it for and, when it is appropriate to stop, how to do this safely. When your treatment is stopped, it is usually done gradually over a period which is specific to you and may occur over a period of weeks to months. If this medicine is being used for the treatment of epilepsy you must continue to take it as prescribed by your doctor.
Do not take Gabapentin capsules:
if you are allergic (hypersensitive) to gabapentin or any of the other ingredients of this medicine (listed in section 6).
Talk to your doctor or pharmacist before taking Gabapentin capsules
Before taking this medicine, tell your doctor if
Taking this medicine regularly, particularly for a long time, can lead to physical dependence and addiction. Your prescriber should have explained how long you will be taking it for and, when it is appropriate to stop, how to do this safely. When your treatment is stopped, it is usually done gradually over a period which is specific to you and may occur over a period of weeks to months.
Physical dependence and addiction can cause withdrawal symptoms when you stop taking this medicine. Withdrawal symptoms can include: trouble sleeping, headache, nausea, feeling anxious, diarrhoea, flu-like symptoms, convulsions, nervousness, depression, thoughts of harming or killing yourself, pain, sweating, and dizziness.
Your prescriber will discuss with you how to gradually reduce your dose before stopping the medicine. It is important that you do not stop taking the medicine suddenly as you will be more likely to experience withdrawal symptoms. Your prescriber will ensure that your plan for stopping treatment is tailored to you and can be adapted according to your needs and experience of any withdrawal symptoms.
Gabapentinoids should only be used by those they are prescribed for. Do not give your medicine to anyone else. Taking higher doses or more frequent doses of gabapentinoids, may increase the risk of addiction. Overuse and misuse can lead to overdose and/or death.
A small number of people being treated with anti-epileptics such as gabapentin have had thoughts of harming or killing themselves. If at any time you have these thoughts, immediately contact your doctor.
Serious skin rashes including Stevens-Johnson syndrome, toxic epidermal necrolysis and drug reaction with eosinophilia and systemic symptoms (DRESS) have been reported in association with gabapentin. Stop using gabapentin and seek medical attention immediately if you notice any of the symptoms related to these serious skin reactions described in section 4.
Read the description of serious symptoms in section 4 of this leaflet under ‘Contact your doctor immediately if you experience any of the following symptoms after taking this medicine as they can be serious’
Muscle weakness, tenderness or pain and particularly, if at the same time, you feel unwell or have a high temperature it may be caused by an abnormal muscle breakdown which can be life - threatening and lead to kidney problems. You may also experience discoloration of your urine, and a change in blood test results (notably blood creatine phosphokinase increased). If you experience any of these signs or symptoms, please contact your doctor immediately.
Other medicines and Gabapentin capsules
Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines. In particular, tell your doctor (or pharmacist) if you are taking or have been recently taking any medicines for convulsions, sleeping disorders, depression, anxiety, or any other neurological or psychiatric problems.
Medicines containing opioids such as morphine
If you are taking any medicines containing opioids (such as morphine), please tell your doctor or pharmacist as opioids may increase the effect of Gabapentin capsules. In addition, combination of Gabapentin capsules with opioids may cause sleepiness, sedation, decrease in breathing, or death..
Antacids for indigestion
If Gabapentin capsules and antacids containing aluminium and magnesium are taken at the same time, absorption of Gabapentin capsules from the stomach may be reduced. It is therefore recommended that Gabapentin capsules are taken at the earliest two hours after taking an antacid.
Gabapentin capsules
Gabapentin capsules can be taken with or without food.
If you are breast - feeding or planning to breastfeed, ask your doctor or pharmacist for advice before taking this medicine.
Pregnancy
Gabapentin capsules can be used during the first trimester of pregnancy if needed.
If you plan to become pregnant or if you are pregnant or think you may be pregnant, talk to your doctor straight away.
If you have become pregnant and you have epilepsy, it is important that you do not stop taking your medicine without first consulting your doctor, as this may worsen your illness. Worsening of your epilepsy may put you and your unborn child at risk.
In a study reviewing data from women in Nordic countries who took gabapentin in the first 3 months of pregnancy, there was no increased risk of birth defects or problems with the development of brain function (neurodevelopment disorders). However, babies of women who took gabapentin during pregnancy had an increased risk of low birth weight and preterm birth.
If used during pregnancy, gabapentin may lead to withdrawal symptoms in newborn infants. This risk might be increased when gabapentin is taken together with opioid analgesics (drugs for treatment of severe pain).
Contact your doctor immediately if you become pregnant, think you might be pregnant or are planning to become pregnant while taking Gabapentin capsules. Do not suddenly discontinue taking this medicine as this may lead to a breakthrough seizure, which could have serious consequences for you and your baby.
Breast - feeding
Gabapentin, the active substance of Gabapentin capsules, are passed on through human milk. Because the effect on the baby is unknown, it is not recommended to breast-feed while using Gabapentin capsules.
Fertility
There is no effect on fertility in animal studies.
Gabapentin capsules may produce dizziness, drowsiness and tiredness. You should not drive, operate complex machinery or take part in other potentially hazardous activities until you know whether this medication affects your ability to perform these activities.
Gabapentin capsules contains lactose
Gabapentin capsules contain lactose (a type of sugar). If you have been told by your doctor that you have an intolerance to some sugars, contact your doctor before taking this medicinal product.
Gabapentin capsules contains sodium
This medicine contains less than 1 mmol sodium (23 mg) per 100 mg, 300 mg and 400 mg hard capsules, that is to say essentially ‘sodium-free’.
Your prescriber should have discussed with you how long the course of capsules will last. They will arrange a plan for stopping treatment. This will outline how to gradually reduce the dose and stop taking the medicine. Your prescriber will ensure that your plan for stopping treatment is tailored to you and can be adapted according to your needs and experience of any withdrawal symptoms.
Always take this medicine exactly as your doctor or pharmacist has told you. Check with your doctor or pharmacist if you are not sure. Do not take more medicine than prescribed.
Your doctor will determine what dose is appropriate for you.
Adults and adolescents
Take the number of capsules as instructed. Your doctor will usually build up your dose gradually. The starting dose will generally be between 300 mg and 900 mg each day. Thereafter, the dose may be increased as instructed by your doctor, up to a maximum of 3600 mg each day and your doctor will tell you to take this in 3 separate doses, i.e. once in the morning, once in the afternoon and once in the evening.
Children aged 6 years and above
The dose to be given to your child will be decided by your doctor as it is calculated against your child’s weight. The treatment is started with a low initial dose which is gradually increased over a period of approximately 3 days. The usual dose to control epilepsy is 25-35 mg per kg per day. It is usually given in 3 separate doses, by taking the capsule(s) each day, usually once in the morning, once in the afternoon and once in the evening.
Gabapentin capsules are not recommended for use in children below 6 years of age.
Adults
Take the number of capsules as instructed by your doctor. Your doctor will usually build up your dose gradually. The starting dose will generally be between 300mg and 900mg each day.
Thereafter, the dose may be increased as instructed by your doctor up to a maximum of 3600 mg each day and your doctor will tell you to take this in 3 separate doses, i.e. once in the morning, once in the afternoon and once in the evening.
Your doctor may prescribe a different dosing schedule and/or dose if you have problems with your kidneys or are undergoing haemodialysis.
You should take the normal dose of Gabapentin capsules unless you have problems with your kidneys. Your doctor may prescribe a different dosing schedule and/or dose if you have problems with your kidneys.
If you have the impression that the effect of Gabapentin capsules are too strong or too weak, talk to your doctor or pharmacist as soon as possible.
Gabapentin capsules are for oral use. Always swallow the capsules with plenty of water.
Continue taking Gabapentin capsules until your doctor tells you to stop.
Higher than recommended doses may result in an increase in side effects including loss of consciousness, dizziness, double vision, slurred speech, drowsiness and diarrhoea. Call your doctor or go to the nearest hospital emergency unit immediately if you take more Gabapentin capsules than your doctor prescribed. Take along any capsules that you have not taken, together with the container and the label so that the hospital can easily tell what medicine you have taken.
If you forget to take a dose, take it as soon as you remember unless it is time for your next dose. Do not take a double dose to make up for a forgotten dose.
Do not suddenly stop taking this medicine. If you want to stop taking this medicine, discuss this with your prescriber first. They will tell you how to do this, usually by reducing the dose gradually so that any unpleasant withdrawal effects are kept to a minimum. This may occur over a period of weeks to months. Your prescriber will ensure that your plan for stopping treatment is tailored to you and can be adapted according to your needs and experience of any withdrawal symptoms.
Withdrawal symptoms such as: trouble sleeping, headache, nausea, feeling anxious, diarrhoea, flu-like symptoms, convulsions, nervousness, depression, thoughts of harming or killing yourself, pain, sweating, and dizziness.
Like all medicines, this medicine can cause side effects, although not everybody gets them.
These symptoms may be the first signs of a serious reaction. A doctor should examine you to decide if you should continue taking Gabapentin capsules.
Other side effects include:
Very common: (may affect more than 1 in 10 people)
Common: (may affect up to 1 in 10 people)
Additionally in clinical studies in children, aggressive behaviour and jerky movements were reported commonly.
Uncommon: (may affect up to 1 in 100 people)
Rare: (may affect up to 1 in 1,000 people)
Not known: frequency cannot be estimated from the available data
Drug Withdrawal
When you stop taking Gabapentin, you may experience drug withdrawal symptoms, which include: trouble sleeping, headache, nausea, feeling anxious, diarrhoea, flu-like symptoms, convulsions, nervousness, depression, thoughts of harming or killing yourself, pain, sweating, and dizziness.
How do I know if I am tolerant or addicted?
If you notice any of the following signs whilst taking gabapentin, it could be a sign that you have become addicted.
If you notice any of these signs, it is important you talk to your prescriber.
If you get any side effects, talk to your doctor or pharmacist or nurse. This includes any possible side effects not listed in this leaflet. You can also report side effects directly (see details below). By reporting side effects you can help provide more information on the safety of this medicine. UK Yellow Card Scheme at: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store.
Keep this medicine out of the sight and reach of children.
Do not use this medicine after the expiry date which is stated on the carton. The expiry date refers to the last day of that month.
This medicinal product does not require any special storage conditions.
Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.
Gabapentin capsules
The active substance is gabapentin. Each hard gelatin capsule contains either 100 mg, 300 mg or 400 mg gabapentin.
The other ingredients in Gabapentin capsules are:
Capsule contents: lactose monohydrate, maize starch and talc.
Capsule shell: gelatin, purified water and sodium laurylsulfate.
The 100 mg capsules contain the colouring titanium dioxide (E 171), the 300 mg capsules contain the colourings titanium dioxide (E 171) and iron oxide yellow (E 172) and the 400 mg capsules contain the colourings titanium dioxide (E 171) and iron oxide yellow and red (E 172). The printing ink used on all capsules contains shellac, Black iron oxide and Potassium hydroxide.
The 100 mg capsules are White/White colored size ‘3’ hard gelatin capsules, filled with white to off-white blend.
The 300 mg capsules are Yellow/Yellow colored size ‘0’ with cap ‘M’ and body ‘300’ printed with black ink, hard gelatin capsules, filled with white to off-white blend.
The 400 mg capsules are Orange/Orange colored size ‘0el’ with cap ‘M’ and body ‘400’ printed with black ink, hard gelatin capsules, filled with white to off-white blend.
Supplied in Clear PVDC coated PVC/aluminium blister pack of PVC/PVDC/aluminium foil blister packs of 10 capsules to give pack size of 10,20, 30, 50, 100, 150, 300, 500, 1000 capsules. Not all pack sizes may be marketed.
This leaflet was revised in 11/2025
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