Consumer medicine information


Gabapentin (gab-a-PEN-tin)

Consumer Medicine Information

What is in this leaflet

This leaflet answers some common questions about Gabapentin-GA.

It does not contain all the available information.

It does not take the place of talking to your doctor or pharmacist.

All medicines have risks and benefits. Your doctor has weighed
the risks to you of taking Gabapentin-GA against the benefits it is
expected to have for you.

If you have any concerns about taking this medicine, ask your
doctor or pharmacist.

Keep this leaflet with the medicine. You may need to read it again.

What Gabapentin-GA is used for

Gabapentin-GA belongs to a group of medicines called anticonvulsants.
These medicines are thought to work by controlling brain chemicals
which send signals to nerves so that seizures do not happen.

Gabapentin-GA is used to help control epilepsy. Epilepsy is
a condition where you have repeated seizures (fits). There are many
different types of seizures, ranging from mild to severe.

Gabapentin-GA is also used to treat neuropathic pain (pain due
to nerves being damaged or affected).

Your doctor may have prescribed Gabapentin-GA for another reason.

Ask your doctor if you have any questions about why Gabapentin-GA
has been prescribed for you.

There is no evidence that Gabapentin-GA is addictive.

This medicine is available only with a doctor’s prescription.

Gabapentin-GA is not recommended for use in children under the
age of 3 years to control epilepsy, as its safety and effectiveness
in that age group have not been established. Also, the safety and
effectiveness of Gabapentin-GA for the treatment of neuropathic pain
in children under the age of 18 years have not been established.

Before you take Gabapentin-GA

When you must not take it

Do not take Gabapentin-GA if you have an allergy to gabapentin
or any of the inactive ingredients listed at the end of this leaflet.

Symptoms of an allergic reaction to Gabapentin-GA may include:

  • shortness of breath, wheezing or difficulty breathing
  • swelling of the face, lips, tongue or other parts
    of the body
  • rash, itching or hives on the skin.

Do not take Gabapentin-GA after the expiry date (EXP) printed
on the pack.
If you take this medicine after the expiry date has passed,
it may not work as well.

Do not take Gabapentin-GA if the packaging is torn or shows
signs of tampering.

If you are not sure whether you should start taking Gabapentin-GA,
talk to your doctor or pharmacist.

Before you start to take it

Tell your doctor or pharmacist if you have allergies to:

  • any other medicines, especially barbiturates or
    any other anticonvulsant medicines
  • any other substances, such as foods, preservatives
    or dyes.

Tell your doctor if you have or have had any medical conditions,
especially the following:

  • kidney problems
  • mixed seizure disorders that include absence seizures.

Tell your doctor if you are pregnant or intend to become pregnant. Gabapentin-GA may affect your developing baby if you take
it during pregnancy. However, it is very important to control your
fits while you are pregnant. If there is a need to consider Gabapentin-GA
during your pregnancy, your doctor can discuss the risks and benefits
of using it whilst you are pregnant. You may have to take folic acid

Tell your doctor if you are breast-feeding or plan to breast-feed. It is recommended that you do not breastfeed while taking
Gabapentin-GA, as it may pass into breast milk and therefore there
is a possibility that the breast-fed baby may be affected. If there
is a need to consider Gabapentin-GA whilst you are breastfeeding your
doctor can discuss with you the possible risks to your baby.

If you have not told your doctor or pharmacist about any of
the above, tell them before you start taking Gabapentin-GA.

Taking other medicines

Tell your doctor or pharmacist if you are taking any other medicines,
including any that you buy without a prescription from your pharmacy,
supermarket or health food shop.

Some medicines and Gabapentin-GA may interfere with each other.
These include:

  • cimetidine, a medicine used to treat stomach or
    duodenal ulcers or reflux
  • antacids, medicines used to treat heartburn or
  • morphine

These medicines may be affected by Gabapentin-GA, or may affect
how well it works. You may need different amounts of your medicine,
or you may need to take different medicines. Your doctor or pharmacist
will advise you.

Your doctor or pharmacist may have more information on medicines
to be careful with or avoid while taking Gabapentin-GA.

How to take Gabapentin-GA

How much to take

Your doctor will tell you how many capsules you will need to
take each day. This may depend on your age, your condition and whether
or not you are taking any other medicines.

Your doctor may recommend that you start with a low dose of
Gabapentin-GA and slowly increase the dose to the lowest amount needed
to control your convulsions or neuropathic pain.

Follow all directions given to you by your doctor carefully. They may differ from the information contained in this leaflet.

If you do not understand the instructions on the box, ask your
doctor or pharmacist for help.

How to take it

Swallow the prescribed dose of Gabapentin-GA capsules with a
full glass of water.

When to take it

Take Gabapentin-GA at about the same time each day. Taking Gabapentin-GA at the same time each day will have the
best effect. It will also help you remember when to take the capsules.

If you are taking Gabapentin-GA three times a day, do not allow
more than 12 hours between doses.

It does not matter if you take Gabapentin-GA before or after

If you forget to take it

If you have missed a dose by not more than 4 hours, take it
as soon as you remember, and then go back to taking your medicine
as you would normally. However, if you have missed a dose by more
than 4 hours, you should skip the dose and continue taking the next
dose when you are meant to.

Do not take a double dose to make up for the dose that you
This may increase the chance of you getting an unwanted side

If you are not sure what to do, ask your doctor or pharmacist.

If you have trouble remembering to take your medicine, ask your
pharmacist for some hints.

How long to take it

Gabapentin-GA helps control your condition, but does not cure
it. Therefore you must take your medicine every day, even if you feel

Continue taking Gabapentin-GA for as long as your doctor tells
you to.

If you take too much (overdose)

Immediately telephone your doctor or the Poisons Information
Centre (telephone 13 11 26), or go to the Accident and Emergency department
at your nearest hospital, if you think that you or anyone else may
have taken too much Gabapentin-GA. Do this even if there are no signs
of discomfort or poisoning. You may need urgent medical attention.

Symptoms of an overdose with Gabapentin-GA include the side
effects listed below in the ‘Side Effects’ section,
but are usually of a more severe nature.

If you take too much Gabapentin-GA, you may feel drowsy, weak,
unsteady when walking, have double vision, slurred speech or diarrhoea.

While you are using Gabapentin-GA

Things you must do

Tell any other doctors, dentists, or pharmacists who are treating
you that you are taking Gabapentin-GA.

If you are about to be started on any new medicine, tell your
doctor, dentist or pharmacist that you are taking Gabapentin-GA.

If you plan to have surgery that needs a general anaesthetic,
tell your doctor or dentist that you are taking Gabapentin-GA.

Tell your doctor if you feel Gabapentin-GA is not helping
your condition.
Your doctor may need to change your medicine.

Tell your doctor if, for any reason, you have not taken Gabapentin-GA
exactly as prescribed.
Otherwise, your doctor may change your treatment unnecessarily.

If you become pregnant while taking Gabapentin-GA, tell your
doctor immediately.

If you need to have any medical tests while you are taking
Gabapentin-GA, tell your doctor.
Gabapentin-GA may affect the results of some tests.

Be sure to keep all of your doctor’s appointments so
that your progress can be checked.
Your doctor will check your progress and may want to take
some tests from time to time. This helps to prevent unwanted side

Things you must not do

Do not stop taking Gabapentin-GA, or lower the dosage, without
checking with your doctor.
Stopping Gabapentin-GA suddenly may cause unwanted effects,
you may experience anxiety, insomnia, nausea, pain and sweating or
it can make your condition worse. Your doctor will slowly reduce your
dose before you can stop taking it completely.

Do not let yourself run out of medicine over the weekend or
on holidays.

Do not give Gabapentin-GA to anyone else, even if their symptoms
seem similar to yours or they have the same condition as you.

Do not take Gabapentin-GA to treat any other complaints unless
your doctor tells you to.

Things to be careful of

Be careful driving or operating machinery until you know how
Gabapentin-GA affects you.
As with other anticonvulsant medicines, Gabapentin-GA may
cause dizziness, light-headedness or drowsiness in some people. Make
sure you know how you react to Gabapentin-GA before you drive a car,
operate potentially dangerous machinery, or do anything else that
could be dangerous if you are dizzy, drowsy or light-headed. If this
occurs do not drive or operate potentially dangerous machinery.

Children should not ride a bike, climb trees or do anything
else that could be dangerous if they are feeling drowsy or sleepy.
Gabapentin-GA may cause drowsiness, dizziness or sleepiness
in some people and affect alertness.

Be careful when drinking alcohol while taking Gabapentin-GA. Combining Gabapentin-GA and alcohol can make you more sleepy,
dizzy or lightheaded. Your doctor may suggest you avoid alcohol while
you are being treated with Gabapentin-GA.

Side effects

Tell your doctor or pharmacist as soon as possible if you
do not feel well while you are taking Gabapentin-GA.
Gabapentin-GA helps most people with epilepsy, but it may
have unwanted side effects in a few people. All medicines can have
side effects. Sometimes they are serious, most of the time they are
not. You may need medical treatment if you get some of the side effects.
If you are over 65 years of age you may have an increased chance of
getting side effects.

Ask your doctor or pharmacist to answer any questions you may

If you get any side effects, do not stop taking Gabapentin-GA
without first talking to your doctor or pharmacist.

Tell your doctor or pharmacist if you notice any of the following
and they worry you:

  • dizziness* or light-headedness
  • feeling tired or drowsy*
  • unfriendliness*
  • unusually overactive*
  • changes in appetite
  • indigestion
  • changes in your weight*
  • nausea and/or vomiting*
  • constipation
  • dry mouth, red swollen gums
  • coughing
  • muscle pain or cramps
  • swollen ankles
  • runny or blocked nose
  • fever*
  • bronchitis*, lung infection*
  • impaired or decreased sensitivity (hypoaesthesia)
  • thinking abnormally
  • impaired sleep patterns
  • mild hypotension
  • diarrhoea

These are the more common side effects of Gabapentin-GA. Mostly
these are mild and short-lived.

Antiepileptics, such as Gabapentin-GA may increase the risk
of suicidal thoughts and behaviour.

If you or someone you know is demonstrating any of the following
warning signs, contact your doctor or a mental health professional
right away or go to your nearest hospital for treatment:

  • thoughts or talk of death or suicide
  • thoughts or talk of self-harm or harm to others
  • any recent attempts at self-harm
  • increase in aggressive behaviour, irritability
    or any other unusual changes in behaviour or mood.

All mentions of suicide or violence must be taken seriously.

Tell your doctor or pharmacist immediately if you notice any
of the following:

  • weakness, unsteadiness when walking, reduced coordination
    or slowed reactions
  • mood changes* such as restlessness, agitation,
    nervousness, irritability
  • forgetfulness, confusion or loss of concentration
  • difficulty speaking or slurred speech
  • blurred or double vision, uncontrollable jerky
    eye movements, difficulty seeing.
  • signs of frequent infections such as fever, severe
    chills, sore throat or mouth ulcers
  • Excessive growth of the breast tissues in males
    and females.
  • Yellowish discoloration of the eyes and skin.

These may be serious side effects. You may need urgent medical
attention. Serious side effects are rare.

The side effects in the above lists marked * have been specifically
reported in children taking Gabapentin-GA

Tell your doctor immediately or go to the Accident and Emergency
department at your nearest hospital if you notice any of the following:

  • more frequent or more severe seizures (fits)
  • sudden signs of allergy such as rash, itching or
    hives, swelling of the face, lips, tongue or other parts of the body,
    shortness of breath, wheezing or difficulty breathing.
  • chest pain, a very fast heart rate

These are very serious side effects. You may need urgent medical
attention or hospitalisation.

These side effects are very rare.

Other side effects not listed above may happen in some people.
Some of these side effects (for example, changes in thyroid function,
structure of bones, high cholesterol or blood pressure) can only be
found when your doctor does tests from time to time to check your

Tell your doctor if you notice anything else that is making
you feel unwell.

Do not be alarmed by this list of possible side effects. You may not experience any of them.

After using Gabapentin-GA


Keep your capsules in the pack until it is time to take them. If you take the capsules out of the pack they will not keep
as well.

Keep your capsules in a cool dry place where the temperature
stays below 25°C.

Do not store Gabapentin-GA or any other medicine in the bathroom
or near a sink.

Do not leave it in on a windowsill or in the car on hot days. Heat and dampness can destroy some medicines.

Keep it where children cannot reach it. A locked cupboard at least one-and-a-half metres above the
ground is a good place to store medicines.


If your doctor or pharmacist tells you to stop taking Gabapentin-GA
or the capsules have passed their expiry date, ask your pharmacist
what to do with any that are left over.

Product description

What it looks like

Gabapentin-GA capsules are available in 300 mg & 400 mg

Gabapentin-GA 300 mg

capsules are opaque with a white body and a yellow cap. There
are 100 capsules in each pack.

Gabapentin-GA 400 mg

capsules are opaque with a white body and an orange cap. There
are 100 capsules in each pack.


Active ingredient:

  • Gabapentin.

Other ingredients:

  • Croscarmellose sodium
  • Magnesium stearate
  • Purified talc
  • Titanium dioxide
  • Gelatin
  • Iron oxide yellow (CI 77492)
  • Black printing ink (TekPrint SW-9008/ TekPrint
  • Iron oxide red (CI 77491) (400 mg capsules only)

Gabapentin-GA capsules do not contain lactose, sucrose, gluten,
tartrazine or any other azo dyes.


Genepharm Pty Ltd.
151-153 Clarendon St
South Melbourne
Vic. 3205

Gabapentin-GA 300 mg capsules: AUST R 81811

Gabapentin-GA 400 mg capsules: AUST R 81812

This leaflet was amended in June 2009

Published by MIMS September 2009