Sustained Release tablets containing indapamide (pronounced in-dap-a-mide)
CONSUMER MEDICINE INFORMATION
What is in this leaflet
This leaflet answers some common questions about Natrilix SR. It does not contain
all the available information about this medicine. Reading this leaflet does not take
the place of talking to your doctor or pharmacist.
All medicines have risks and benefits. Your doctor has weighed the risks of you taking
Natrilix SR against the expected benefits 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 Natrilix SR is
The name of your medicine is Natrilix SR. The medicine releases the active ingredient
indapamide progressively over 24 hours. Indapamide belongs to a group of medicines
called chlorosulphamoyl diuretics (a type of "fluid" or "water" tablet).
What Natrilix SR is used for
You have been prescribed Natrilix SR for high blood pressure.
Natrilix SR is available only with a doctor's prescription.
There is no evidence that Natrilix SR is addictive.
Why Natrilix SR is used for high blood pressure
Everyone has blood pressure. This pressure helps to circulate blood all around the
body. Your blood pressure may be different at different times of the day, depending
on how busy or stressed you are.
You have high blood pressure (also known as hypertension) which is when your blood
pressure stays higher than is needed, even when you are calm and relaxed.
If high blood pressure is not treated it can lead to serious health problems. You
may feel fine and have no symptoms, but eventually it can cause stroke, heart disease
and kidney failure.
Natrilix SR helps to lower your blood pressure.
Ask your doctor if you have any questions about why Natrilix SR has been prescribed
Before you take Natrilix SR
There are some people who should not take Natrilix SR. Please read the lists below.
If you think any of these situations apply to you, or you have any questions, please
consult your doctor or pharmacist.
When you must not take Natrilix SR
Do not take Natrilix SR if:
You are allergic to indapamide, or any of the other ingredients of Natrilix SR listed
at the end of this leaflet.
You are allergic to sulphonamide (sulpha) antibiotics, or to thiazide diuretics (a
type of "fluid" or "water" tablet).
You are pregnant or trying to become pregnant.
You are breastfeeding or plan to breast-feed.
You have severe kidney disease.
You have severe liver disease or suffer from a condition called hepatic encephalopathy
(liver problems which affect the brain and central nervous system).
You have low potassium levels in your blood.
The packaging is torn or shows signs of tampering, or the tablets do not look quite
The expiry date (EXP) on the pack has passed.
Before you start to take it
Tell your doctor straight away if:
You have an intolerance to lactose.
You have or have had any other health problems, including:
High or low levels of potassium, sodium, or other problems with salt balance.
Increased sensitivity to sunlight (photosensitivity reactions).
Systemic lupus erythematosus (a disease affecting the skin, joints and kidneys).
Heart rhythm problems.
Problems with your kidneys.
If you experience a decrease in vision or eye pain. These could be symptoms of fluid
accumulation in the vascular layer of the eye or an increase of pressure in your eye
and can happen within hours to a week of taking NATRILIX SR. This can lead to permanent
vision loss, if not treated. If you earlier have had a penicillin or sulfonamide allergy,
you can be at higher risk of developing this.
You have muscle disorders including muscle pain, tenderness, weakness or cramps.
A test to check how well your parathyroid gland is working.
Athletes should be aware that this medicine contains an active ingredient, which may
give a positive reaction in doping tests.
Taking other medicines
Tell your doctor if you are taking any other medicines, including medicines that you
buy without a prescription from a pharmacy, supermarket or health food shop.
Taking Natrilix SR may change the effect of some medicines, and some medicines may
affect how well Natrilix SR works. You may need different amounts of your medication
or to take different medicines.
You should not take Natrilix SR with lithium medications (used to treat mood swings
and some types of depression) due to the risk of increased levels of lithium in the
The medicines that may interact with Natrilix SR include the following:
Some steroid medicines.
Diuretics (sometimes called "fluid" or "water" tablets, e.g. amiloride, spironolactone,
Medicines used for heart rhythm problems (e.g. disopyramide, amiodarone, sotalol,
Some medications used to treat high blood pressure (e.g. angiotensin converting enzyme
(ACE) inhibitors), a fast or irregular heartbeat and other heart conditions.
Medicines to treat mental illnesses such as some medicines for epilepsy, anxiety,
schizophrenia and some other antidepressants (e.g. tricyclic antidepressants, antipsychotic
drugs, neuroleptics such as: droperidol, haloperidol, chlorpromazine, trifluoperazine,
amisulpride, sulpiride, psychoanaleptics).
Antiparasitic medicines used to treat certain types of malaria (e.g. chloroquine).
Pentamidine (a medicine used to treat certain types of pneumonia).
Antihistamines used to treat allergic reactions, such as hay fever.
Medicines used to treat nausea and vomiting (e.g ondansetron, domperidone)
Medicines used to treat cancer (e.g vandetanib, oxaliplatin).
Anagrelide (used to reduce elevated blood platelet counts).
Non-steroidal anti-inflammatory drugs for pain relief (e.g. ibuprofen) or high doses
Baclofen (a medicine used to treat muscle stiffness occurring in diseases such as
Metformin (a medicine used to treat diabetes).
Cyclosporin, tacrolimus (medicines used to treat certain problems with the immune
Medicines used to treat fungal infections (e.g. Amphotericin B by IV, fluconazole).
Medicines used during scans to see the images of your body.
Medicines used to treat gastro-intestinal problems (e.g. cisapride, papaverine).
Medicines used to treat bacterial infections (e.g. Moxifloxacin, ciprofloxacin, clarithromycin,
erythromycin by IV ).
Allopurinol (a medicine used to treat gout).
Tetracosactide (to treat Crohn’s disease).
Methadone (used to treat addiction).
Cilostazol (used to treat cramp-like pain in the legs when you walk).
Your doctor or pharmacist has more information on medicines to be careful with or
avoid while taking Natrilix SR.
For older people or children
Elderly people can generally use Natrilix SR safely. However, some older people have
reduced kidney function - in which case additional care may be required.
Natrilix SR is not recommended for use in children.
How to take Natrilix SR
Follow all directions given to you by your doctor and pharmacist carefully. If you
do not understand the instructions on the label, ask your doctor or pharmacist for
Your doctor will select a dose when they prescribe Natrilix SR for you. The usual
dose is one tablet once daily.
Swallow your tablet with water, preferably in the morning. Do not crush or break them.
How long to take Natrilix SR for
Natrilix SR can help to control your blood pressure, but cannot cure it. Natrilix
SR treatment is usually for life - so you should keep taking the tablets regularly
unless advised otherwise by your doctor.
If you forget to take Natrilix SR
If your next usual dose is less than 6 hours away, just leave out the dose that you
missed. Take the next dose at the usual time and continue as normal.
If your next dose is more than 6 hours away, take the dose you have missed as soon
as you realise. Then take the next dose at the usual time and continue as normal.
Do not try to make up for missed doses by taking more than one dose at a time.
If you take too much Natrilix SR
Taking too much Natrilix SR (an overdose) may cause low blood pressure (also known
as hypotension). Other effects like sickness, cramps, sleepiness, confusion, kidney
problems, salt and water disturbances are possible. You may require urgent medical
If you think that you or anyone else may have taken too much Natrilix SR then act
Telephone your doctor or the Poisons Information Centre (13 11 26 in Australia), or
go to the Accident and Emergency department at your nearest hospital. Do this even
if there are no signs of discomfort or poisoning.
While you are taking Natrilix SR
Things you must do
Take Natrilix SR exactly as your doctor has prescribed. Otherwise you may not get
the benefits from treatment.
Tell all doctors, dentists and pharmacists who are involved with your treatment that
you are taking Natrilix SR.
Make sure you drink enough water during exercise and hot weather especially if you
sweat a lot. This will help you avoid any dizziness or light-headedness caused by
a sudden drop in blood pressure.
Tell your doctor straight away if you have excessive vomiting or diarrhoea while taking
Natrilix SR as these may affect how Natrilix SR is processed by your body. If you
experience any of the following symptoms, you may be dehydrated because you are losing
too much water:
Dry mouth or thirst
Tiredness or drowsiness
Muscle pain or cramps
Fast heart beat
Passing less urine than normal.
Things you must not do
Do not give this medicine to anyone else, even if they have the same condition as
Do not use Natrilix SR to treat any other complaints unless your doctor tells you
Do not stop taking Natrilix SR or change the dose, without checking with your doctor.
Things to be careful of
Be careful when driving or operating machinery until you know how Natrilix SR affects
You may feel light-headed or dizzy when you begin to take Natrilix SR. This is because
your blood pressure is falling. Symptoms are likely to be made worse if you drink
alcohol or take strong pain killers.
If you have these symptoms when standing up or getting out of bed then getting up
more slowly can help. This allows your body to get used to the change in position
and blood pressure.
Natrilix SR may cause your skin to become more sensitive to the sun. If this happens
you should stop taking Natrilix SR and contact your doctor.
If you have these symptoms and they don't get better in a short time then talk to
Unwanted effects potentially due to treatment
If you do not feel well while you are taking Natrilix SR then tell your doctor or
pharmacist as soon as possible.
All medicines can have side effects. Most of the time they are not serious but sometimes
they can be.
Natrilix SR helps most people with high blood pressure, but it may sometimes have
unwanted side effects. These can include:
Feeling tired or as if you have less energy, difficulty sleeping.
Feeling faint, light-headed, or dizzy.
Feeling nervous or anxious.
Feeling sick or having an upset stomach, having an uncomfortable feeling after eating,
vomiting or constipation.
Muscle weakness, pain, tenderness, cramp, tingling or numbness of the hands or feet
(and particularly if at the same time you feel unwell or have a high temperature it
may be caused by an abnormal muscle breakdown (not known)).
Skin rashes or other allergic reactions.
Increased sensitivity to sunlight.
An increased risk of becoming dehydrated (in elderly patients and in patients with
Low potassium levels. Symptoms of low potassium can include a number of those listed
above, and very occasionally this may be severe.
Inflammation of the pancreas.
Hepatic encephalopathy (liver problems which affect the brain and central nervous
Abnormal liver function.
If you suffer from systemic lupus erythematosus (a type of collagen disease), this
might get worse.
Changes in blood cells, such as thrombocytopenia (a decrease in the number of platelets
which causes easy bruising and nasal bleeding), leucopoenia (a decrease of white blood
cells which may cause unexplained fever, soreness of the throat or other flu-like
symptoms) and anaemia (a decrease in red blood cells).
Low blood pressure, unusual heart beat.
High level of calcium in blood
Blurred or changed vision, short sightedness (myopia).
Decrease in vision or pain in your eyes due to high pressure (possible signs of fluid
accumulation in the vascular layer of the eye or acute angle-closure glaucoma).
Most of these side effects are mild when they occur. Do not be alarmed by this list
of possible side effects. You may not experience any of them. However, if you do -
or if you notice anything else that is making you feel unwell - you should consult
your doctor or pharmacist.
Changes may occur in your laboratory parameters (blood tests) and your doctor may
need to give you blood tests to check your condition. The following changes in laboratory
tests may occur low potassium in the blood, low sodium in the blood (that may lead
to dehydration and low blood pressure), increase in uric acid (a substance which may
cause or worsen gout), increase in blood glucose levels in diabetic patients, increased
levels of liver enzymes.
If any of the signs below occur then tell your doctor immediately or go to the Accident
and Emergency department at your nearest hospital:
Swelling of your lips, face, mouth, tongue or throat.
Purple spots with occasional blisters on the front of your arms and legs and/or around
your neck and ears (a rare condition known as Stevens-Johnson Syndrome).
Toxic epidermal necrolysis.
A fast and irregular heart beat.
Severe blisters, skin rash, itching or other allergic reactions.
These side effects are extremely rare but can become serious.
After taking Natrilix SR
Keep your tablets in the pack until it is time to take them. Keep them in a cool,
dry place where it stays below 25°C. Keep them where children cannot reach them.
If your doctor tells you to stop taking Natrilix SR, or the tablets have passed their
expiry date, return any leftover tablets to your pharmacist for disposal.
Natrilix SR is registered on the Australian Register of Therapeutic Goods and has
the Australian Register Number: AUST R 66849
What Natrilix SR looks like
Natrilix SR tablets are white and round.
Natrilix SR tablets come in a blister strip. Each box contains either 30 or 90 tablets.
Each tablet of Natrilix SR contains 1.5 mg of indapamide hemihydrate as the active
ingredient and a number of inactive ingredients.
The inactive ingredients in Natrilix SR tablets include colloidal anhydrous silica,
glycerol, hypromellose, lactose, macrogol 6000, magnesium stearate, povidone, and
The tablets are gluten free.
Natrilix SR is a product discovered by Servier Research International.
It is distributed in Australia by:
Servier Laboratories (Aust) Pty Ltd
8 Cato Street
Hawthorn, 3122, Victoria
This leaflet was last revised in February 2020.