Consumer Medicine Information
What is in this leaflet
This leaflet answers some common questions about Cordarone X tablets and injection.
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. In deciding to give you Cordarone X, your doctor
has weighed the risks of you taking Cordarone X against the benefits it will have
If you have any concerns about taking this medicine, ask your doctor or pharmacist.
Keep this leaflet with this medicine.
You may need to read it again.
What Cordarone X is used for
Cordarone X is used to control a fast or irregular heart beat.
It works by lengthening the gap between one heart beat and the next, helping to bring
the heart rate to a slower and more regular pace.
Cordarone X is not recommended for use in children.
Your doctor may have prescribed this medicine for another reason.
Ask your doctor or pharmacist if you have any questions about why this medicine has
been prescribed for you.
Before you take it
When you must not use Cordarone X
1. Do not use Cordarone X if you are allergic to amiodarone or iodine or any of the ingredients
listed at the end of this leaflet.
The symptoms of an allergic reaction may include a rash, itching, swelling, coughing,
an asthma attack or hayfever.
2. Do not use Cordarone X if you are pregnant or intending to get pregnant.
Cordarone X is best avoided in the 3 months before getting pregnant and during pregnancy.
This is because it can stay in the body for several months even after you stop taking
3. Do not breastfeed if you are using Cordarone X as it can be found in breast milk.
If you are breastfeeding, alternative feeding arrangements such as bottle feeding
should be made for your baby.
Talk to your doctor about the risks and benefits of taking Cordarone X during pregnancy
4. Do not use Cordarone X if you have or have had any thyroid problems.
5. Do not use Cordarone X if you have heart problems that may cause you to faint.
If you have a pacemaker, your doctor may allow the use of it.
6. Do not use Cordarone X injection if you have any of the following:
Low blood pressure
Severe problems in breathing
Heart disease or failure
7. Do not use Cordarone X injection in neonates (children less than one month of age)
or premature neonates.
Talk to your doctor if you are unsure whether you have any of the conditions listed
Make sure your doctor is aware of all medications you are taking as some medications
may affect how Cordarone X works.
Do not use Cordarone X after the expiry (EXP) printed on the pack.
It you use the medicine after the expiry date has passed, it may not work as well.
Do not use Cordarone X if the packaging is torn or shows signs of tampering.
Do not use it to treat any other complaint unless your doctor says it is safe. Do
not give this medicine to anyone else.
Before you start to use Cordarone X
Tell your doctor if you are pregnant or intend to become pregnant.
Tell your doctor if you are breastfeeding or planning to breastfeed.
Tell your doctor if you have or have had any medical conditions, especially the following:
Other heart conditions
Blood pressure problems
If you have not told your doctor about any of the above, tell them before you use
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
Some medicines may be affected by Cordarone X, or may affect how well Cordarone X
You need to tell your doctor if you are using any other medicines, including:
any medicines for your heart
any medicines for your blood pressure
medicines which reduce the activity of your immune system, such as ciclosporin, cortisone
diuretics (water tablets)
antibiotics, including intravenous erythromycin and pentamidine
stimulant laxatives e.g. Bisacodyl, castor oil, senna
MAO inhibitors (a type of medicine used to treat depression)
antipsychotics (medicines used to treat certain mental and emotional conditions)
phenytoin (a medicine used to treat epilepsy)
warfarin and other medicines which thin the blood
simvastatin and other statins (medicines used to lower cholesterol)
colchicine (a medicine used to treat gout)
digoxin (a medicine used to treat heart conditions)
medicines to treat a fast or irregular heart beat such as flecainide and sotalol
fentanyl (a medicine used to treat pain)
triazolam (a medicine used to treat insomnia)
ergotamine (a medicine used to treat migraine)
lidocaine (lignocaine) (a topical anaesthetic)
amphotericin B (amphotericin) (a medicine used to treat fungal infections)
antiviral medication eg sofosbuvir, daclatasvir, simeprevir, ledipasvir
If you are unsure whether you are taking one of the above drugs, ask your doctor or
Your doctor or pharmacist can tell you what to do if you are taking any of these medicines.
If you have not told your doctor about any of these things, tell them before you take
How to use Cordarone X
How to take it (tablets)
Therapy will be started as soon as possible once your heart beat is controlled. An
overlap of up to 2 days with the injection may occur.
Swallow Cordarone X tablets whole, with water or another liquid such as tea or milk.
How much to take (tablets)
The usual dose is outlined below:
200 mg, three times a day for 1 week.
Therapy is then continued with 200 mg two times a day for a further week.
The dose may then be reduced to 200 mg once per day.
Your doctor or pharmacist will tell you how many Cordarone X tablets you should take.
The directions given to you by your doctor or pharmacist may be different from the
information in this leaflet.
Talk to your doctor or pharmacist if you are unsure what dose to take.
Do not stop taking it unless your doctor tells you to, even if you feel better.
How to give it (injection)
The injectable dose will only be given in hospitals.
How much to give (injection)
The usual dose is:
5 mg/kg given slowly over a period of 20 minutes to 2 hours.
Further doses may also be given based upon your response to the treatment. An overlap
of up to 2 days with the tablets may occur.
If you forget to take it
If you miss a dose, take it as soon as you remember. If it is almost time for your
next dose, skip the dose you missed, and take your next dose when you are meant to.
Do not take a double dose to make up for the dose that you missed.
If you are not sure what to do, or have trouble remembering when to take your medicine,
ask your doctor or pharmacist.
If you take too much (overdose)
Immediately telephone your doctor, or the Poisons Information Centre (telephone 13
11 26 or New Zealand 0800 POISON or 0800 764766), or go to Accident and Emergency
at your nearest hospital, if you think you or anyone else may have taken too much
Cordarone X. Do this even if there are no signs of discomfort or poisoning.
You may need urgent medical attention.
While you are using Cordarone X
Things you must do
Be sure to keep all of your doctor appointments so that your progress can be checked.
To help prevent unwanted side effects, your doctor may need to perform the following
tests, depending on the length of treatment with Cordarone X:
Liver function tests
Take Cordarone X exactly as your doctor has prescribed.
Tell all the doctors, dentists and pharmacists who are treating you that you are using
Tell your doctor if you become or intend to become pregnant while using Cordarone
Things you must not do
Do not suddenly stop taking Cordarone X without checking with your doctor.
Do not use Cordarone X to treat any other complaints unless your doctor says it is
Do not give this medicine to anyone else, even if they have the same condition as
Things to be careful of
Always use a 30+ sunscreen and wear a hat and protective clothing when you are outdoors.
Do not use a sunlamp.
Using Cordarone X may make your skin more sensitive to the sun or sunlamps.This can
range from an increased tendency to tan to intense redness and swelling of the skin.
If you are going to have surgery, tell the anaesthetist that you are using Cordarone
This medicine may affect some of the medicines that may be needed, such as general
Tell your doctor or medical professional that you are using Cordarone X before you
are given any medical procedure or any new medicines.
Avoid drinking large quantities of grapefruit juice as it may affect the absorption
of Cordarone X.
Tell your doctor or pharmacist as soon as possible if you do not feel well while using
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.
Treatment with amiodarone may cause serious lung, liver and eye damage and may worsen
Tell your doctor if you notice any of the following and they worry you:
symptoms of an overactive thyroid including increase in appetite, weight loss, restlessness,
heat intolerance, increased sweating, tremors, swelling of your neck (goiter) and
a rapid heart rate
symptoms of an underactive thyroid including tiredness, lethargy, muscle weakness,
cramps, feeling the cold, a slow heart rate, dry and flaky skin, hair loss, a deep
and husky voice and weight gain
allergic condition which causes joint pain, skin rashes, fever and kidney problems
a feeling of "pins and needles" or numbness in the hands, legs or feet
muscle weakness, uncontrolled movements or poor coordination
small cloudy spots forming on the eyeball. These usually go away after you stop the
drug and they rarely affect your sight
increased skin sensitivity to sunlight - always wear a sunscreen
bluish skin discolouration
rash or hives
pain or swelling at the site where you were injected
tremor, insomnia or other sleep disorders, vivid dreams or nightmares
loss of appetite
slow heart beat
Tell your doctor immediately if you notice any of the following:
yellowing of the skin or eyes (called jaundice, a symptom of liver changes)
shortness of breath, wheezing or other difficulty in breathing
swelling of the face, lips, mouth, tongue or throat
clumsiness and lack of coordination, affecting balance and manner of walking, limb
or eye movements and/or speech
chest pain, cough or spitting up of blood
nausea or vomiting, stomach pain, yellow skin, unusual tiredness or passing dark-coloured
changes to heartbeat such as pounding heart, very rapid or very slow heartbeat
faintness or light headedness
blurring or deterioration of vision, sensitisation of eyes to light
severe blisters and bleeding in the lips, eyes, mouth, nose and genitals
These may be serious side effects of Cordarone X. If any of the above symptoms occurs
or you suspect any other drug reaction, please consult your doctor immediately.
Other side effects not listed above may also occur in some patients. 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
Your doctor will monitor you very carefully for side effects. This will involve blood
tests to check how well your liver and thyroid are functioning. It will also involve
regular chest x-rays, ECGs and eye tests.
Your doctor will tell you how often you need to have these tests. This will depend
on how long you are on Cordarone X for and what dose you are on.
After using Cordarone X
Keep your tablets in the blister pack until it is time to take them.
If you take the tablets out of the box or blister pack they may not keep well.
Keep it in a cool, dry place where the temperature stays below 30°C.
Do not store it or any other medicine in the bathroom or near a sink.
Do not leave it in the car or on window sills.
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 you need to store it before taking it to a hospital, make sure it is stored in
a place where the temperature is between 8 and 25°C. Do not refrigerate.
Cordarone X injection should only be given to you in a hospital.
If your doctor tells you to stop taking Cordarone X, or it has passed its expiry date,
ask your pharmacist what to do with any medicine that is left over.
What it looks like
Cordarone X tablets are available in two different strengths:
100 mg tablets
white to off-white biconvex tablet embossed on one side with '100' and 'action potential'
and scored on other.
200 mg tablets:
white to off-white biconvex tablet embossed with '200' and 'action potential' on one
side and scored on the other.
Each box contains 30 tablets.
Cordarone X injection is a clear, pale yellow solution. The injection comes as a 3
Each box contains 6 ampoules.
100 mg tablets: each tablet contains amiodarone hydrochloride 100 mg.
200 mg tablets: each tablet contains amiodarone hydrochloride 200 mg.
The tablets also contain lactose monohydrate, maize starch, povidone, anhydrous colloidal
silica and magnesium stearate.
Each 3mL ampoule contains amiodarone hydrochloride 150 mg.
The injection also contains benzyl alcohol, polysorbate 80 and water for injections.
Cordarone X is supplied in Australia by:
sanofi-aventis australia pty ltd
12-24 Talavera Road
Macquarie Park NSW 2113
Cordarone X is supplied in New Zealand by:
sanofi-aventis new zealand limited
56 Cawley Street
This leaflet was prepared in November 2021
Australian Registration Number:
100 mg Tablets: AUST R 15359
200 mg Tablets: AUST R 15361
Injection: AUST R 15360
® Registered Trademark