irbesartan & hydrochlorothiazide
Consumer Medicine Information (CMI)
NOTICE: This Consumer Medicine Information (CMI) is intended for persons
living in Australia. This page contains answers to some common
. It does
not contain all the information that is known about
. It does not take the
place of talking to your doctor or pharmacist. All medicines have risks
and benefits. Your doctor has weighed the risk of you using this medicine
against the benefits he/she expects it will have for you. If you have
any concerns about using this medicine, ask your doctor or pharmacist.
Bookmark or print this page, you may need to read it again.
What Irbesartan HCT Winthrop is used for
Irbesartan HCT Winthrop is used to lower high blood pressure, which doctors call hypertension.
Everyone has blood pressure. This pressure helps get your blood all around your body. Your blood pressure may be different
at different times of the day, depending on how busy or worried you are. You have hypertension (high blood pressure) when
your blood pressure stays higher than is needed, even when you are calm and relaxed.
There are often no symptoms of high blood pressure. The only way of knowing that you have high blood pressure is to have your
blood pressure checked on a regular basis.
If high blood pressure is not treated it can lead to serious health problems, such as stroke, heart disease and kidney failure.
How Irbesartan HCT Winthrop works
Irbesartan HCT Winthrop contains irbesartan and hydrochlorothiazide. Both medicines reduce blood pressure in different ways.
Irbesartan belongs to a group of medicines known as angiotensin-II receptor antagonists. Angiotensin-II is a substance produced
in the body that causes blood vessels to narrow. Irbesartan blocks angiotensin-II and therefore widens your blood vessels,
making it easier for your heart to pump blood throughout your body. This helps to lower your blood pressure.
Hydrochlorothiazide belongs to the class of medicines known as diuretics. Diuretics cause an increase in the volume of urine.
They also help with lowering blood pressure particularly when combined with other blood pressure reducing medicines.
Your doctor may have prescribed Irbesartan HCT Winthrop for another reason. Ask your doctor if you have any questions about
why Irbesartan HCT Winthrop has been prescribed for you.
This medicine is only available with a doctor's prescription.
There is no evidence that this medicine is addictive.
Before you take Irbesartan HCT Winthrop
When you must not take it
Do not take Irbesartan HCT Winthrop if:
you are pregnant (or think you may be pregnant) or are planning to become pregnant.
Irbesartan HCT Winthrop may affect your developing baby if you take it during pregnancy.
you are breast-feeding or are planning to breast-feed.
you are allergic to irbesartan or hydrochlorothiazide or to sulfonamide derived medicines (commonly known as sulfur drugs),
or to any of the ingredients listed under at the end of this leaflet.
you are taking a medicine containing aliskiren and either have diabetes or moderate to severe kidney impairment
you are not producing urine.
the packaging is torn or shows signs of tampering.
the expiry date on the pack has passed.
If you take this medicine after the expiry date has passed, it may not work.
If you are not sure if you should start taking Irbesartan HCT Winthrop, talk to your doctor.
Irbesartan HCT Winthrop should not be given to children.
Before you start to take it
Tell your doctor if have any allergies to:
any of the ingredients listed at the end of this leaflet including lactose
any other medicines, including sulfonamide derived medicines (commonly known as sulfur drugs)
any other substances , such as foods, preservatives or dyes
Tell your doctor if you are pregnant or intend to become pregnant.
Tell your doctor if you are breast-feeding or plan to breastfeed.
Tell your doctor if you have or have had any medical conditions, especially the following:
recent excessive vomiting or diarrhoea or think you are dehydrated
kidney problems, or have had a kidney transplant or dialysis
liver problems, or have had liver problems in the past
gout or have had gout in the past
high or low levels of potassium or sodium or other electrolytes in your blood
you are strictly restricting your salt intake
you have had a sympathectomy
you have been taking diuretics
you have a history of allergy or asthma
Tell your doctor if you plan to have surgery (even at the dentist) that needs a general anaesthetic.
If you have not told your doctor about any of the above, tell them before you take Irbesartan HCT Winthrop.
Taking other medicines
Tell your doctor if you are taking any other medicines, including any that you buy without a prescription from your pharmacy,
supermarket or health food shop.
It is especially important that you tell your doctor if you are taking or plan to take any of the following:
other medicines for high blood pressure
other fluid tablets or diuretics
lithium or lithium-containing medicines (for example lithium carbonate)
potassium-containing salt substitutes
anti-inflammatory medicines such as non-steroidal anti-inflammatory agents (for example diclofenac, ibuprofen) and COX-2 inhibitors
(for example celecoxib) used to relieve pain, swelling and other symptoms of inflammation including arthritis. Taking Irbesartan
HCT Winthrop and an anti-inflammatory medicine alone or with a thiazide diuretic (fluid tablet) may damage your kidneys. It
may also reduce the effect Irbesartan HCT Winthrop has on lowering blood pressure
a medicine containing aliskiren. Taking Irbesartan HCT Winthrop with aliskiren may affect your blood pressure, electrolyte
balance and your kidney function
strong pain killing medicines such as codeine or morphine
medicines for diabetes (oral tablets or capsules or insulins)
calcium supplements or medicines containing calcium
medicines for gout
powder or granules used to help reduce cholesterol (cholestyramine or colestipol hydrochloride)
heart medicines such as digoxin or antiarrhythmic medicines (for example sotalol hydrochloride)
corticosteroid medicines such as prednisone, cortisone or ACTH
medicines used to treat cancer (cytotoxic medicines)
amantadine, a medicine used to treat Parkinson's disease or to prevent influenza
anticholinergic medicines, these can be used to treat Parkinson's disease, to relieve stomach cramps or spasms or used to
prevent travel sickness
carbamazepine, an anticonvulsant medication
medicines used during surgery
medicines used in an emergency situation such as adrenaline
Your doctor will decide whether your treatment needs to be altered or whether you should have check ups more frequently.
Your doctor and pharmacist may have more information on medicines to be careful with or avoid while taking Irbesartan HCT
How to take Irbesartan HCT Winthrop
How much to take:
Irbesartan HCT Winthrop will usually be prescribed by your doctor if previous treatment does not produce a sufficient drop
in your blood pressure. Your doctor will tell you how to switch from your previous treatment to Irbesartan HCT Winthrop.
The usual dose of Irbesartan HCT Winthrop is one tablet a day. The full blood pressure lowering effect should be reached 6-8
weeks after beginning treatment. If your blood pressure is not satisfactorily reduced with Irbesartan HCT Winthrop, your doctor
may prescribe another medicine to be taken with Irbesartan HCT Winthrop.
How to take it
Swallow the tablet whole with a glass of water.
It does not matter whether you take Irbesartan HCT Winthrop tablets before or after food.
When to take it
Take Irbesartan HCT Winthrop at about the same time each day.
Taking your tablets at the same time each day will have the best effect. It will also help you remember when to take the tablets.
How long to take it
Continue taking Irbesartan HCT Winthrop until your doctor tells you to stop.
Irbesartan HCT Winthrop helps control your high blood pressure but does not cure it. Therefore Irbesartan HCT Winthrop must
be taken every day.
To help you remember to take your tablets each day, Irbesartan HCT Winthrop tablets are supplied in a Calendar pack with the
foil backing marked with the days of the week. This is just a way to help you to remember to take your tablets. All of the
tablets in the pack are the same.
When you start a new strip of tablets, take the tablet marked "START". On the next day, take the tablet marked with the relevant
day of the week.
Continue taking your tablets each day until all of the tablets are taken. Commence the next strip at "START" and continue
If you forget to take it
If it is almost time for your next dose, skip the dose you missed and take your next dose when you are meant to. Otherwise,
take it as soon as you remember, and go back to taking your tablets as you would normally.
Do not take a double dose to make up for the dose you missed.
This may increase the chance of you getting any unwanted side effects.
If you have trouble remembering to take your tablets, ask your pharmacist for some hints.
If you take too much (overdose)
Immediately telephone your doctor or Poisons Information Centre (telephone: 13 11 26) or go to Accident and Emergency at your
nearest hospital, if you think that you or anyone else may have taken too much Irbesartan HCT Winthrop.
Do this even if there are no signs of discomfort or poisoning.
You may need urgent medical attention.
If you take too many Irbesartan HCT Winthrop tablets, you will probably feel lightheaded or dizzy.
While you are using Irbesartan HCT Winthrop
Things you must do
Tell any other doctors, dentists and pharmacists who are treating you that you are taking Irbesartan HCT Winthrop.
If you become pregnant while taking Irbesartan HCT Winthrop tell your doctor immediately.
Have your blood pressure checked when your doctor tells you to, to make sure Irbesartan HCT Winthrop is working.
If you are about to be started on any new medicine, tell your doctor and pharmacist that you are taking Irbesartan HCT Winthrop.
If you plan to have surgery or other treatment (even at the dentist) that needs an anaesthetic, make sure that you tell your
doctor or dentist that you are taking Irbesartan HCT Winthrop.
Your blood pressure may drop suddenly.
Make sure you drink enough water during exercise and hot weather when you are taking Irbesartan HCT Winthrop, especially if
you sweat a lot.
If you do not drink enough water while taking Irbesartan HCT Winthrop, you may faint or feel light-headed or sick. This is
because your body does not have enough fluid and your blood pressure is low. If you continue to feel unwell, tell your doctor.
If you have excessive vomiting and/or diarrhoea while taking Irbesartan HCT Winthrop, tell your doctor.
You may lose too much water and salt and your blood pressure may drop too much.
If you feel light headed or dizzy after taking your first dose of Irbesartan HCT Winthrop, or when your dose is increased,
tell your doctor immediately.
Things you must not do
Do not give Irbesartan HCT Winthrop tablets to anyone else, even if they have the same condition as you.
Do not take Irbesartan HCT Winthrop to treat any other complaints unless your doctor or pharmacist tells you to.
Do not stop taking Irbesartan HCT Winthrop, or lower the dosage, without checking with your doctor.
Things to be careful of
If you feel light-headed, dizzy or faint when getting out of bed or standing up, get up slowly.
Standing up slowly, especially when you get up from bed or chairs, will help your body get used to the change in position
and blood pressure. If this problem continues or gets worse, talk to your doctor.
Be careful driving or operating machinery until you know how Irbesartan HCT Winthrop affects you. As with many other medicines
used to treat high blood pressure, Irbesartan HCT Winthrop may cause dizziness or light-headedness in some people. If this
occurs do not drive. Make sure you know how you react to Irbesartan HCT Winthrop before you drive a car, operate machinery
or do anything else that could be dangerous if you are dizzy or light-headed.
If you drink alcohol, dizziness or light-headedness may be worse.
The hydrochlorothiazide contained in this medicine could produce a positive analytical result in an antidoping test.
Things that would be helpful for lowering your blood pressure
Some self help measures suggested below may help your condition. Talk to your doctor or pharmacist about these measures and
for more information.
your doctor may advise you to limit your alcohol intake.
if you are overweight, your doctor may suggest losing some weight to help lower your blood pressure and help lessen the amount
of work your heart has to do. Some people may need a dietician's help to lose weight.
your doctor may advise you to eat a healthy low-fat diet which includes plenty of fresh vegetables, fruit, bread, cereals
your doctor may advise you to watch the amount of salt in your diet. To reduce your salt intake you should avoid using salt
in cooking or at the table.
regular exercise helps to reduce blood pressure and helps get the heart fitter, but it is important not to overdo it. Walking
is good exercise, but try to find a route that is reasonably flat. Before starting any exercise, ask your doctor about the
best kind of programme for you.
your doctor may advise you to stop smoking or at least cut down.
Tell your doctor or pharmacist as soon as possible if you do not feel well while you are taking Irbesartan HCT Winthrop.
Irbesartan HCT Winthrop helps most people with high blood pressure, 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.
Ask your doctor or pharmacist to answer any questions you may have.
Tell your doctor if you notice any of the following and they worry you:
dizziness or light-headedness (vertigo)
unusual tiredness or weakness, fatigue
pain in the stomach or gut nausea and/or vomiting
These are generally mild and do not normally require treatment to be interrupted.
Tell your doctor immediately if you notice any of the following:
skin rash or itchiness
aching muscles or sore joints, not caused by exercise
muscle pain or weakness
buzzing, ringing or other persistent noise in the ears
changes in heart rhythm
you are not urinating (passing water) as much as normal
numbness or tingling in fingers or toes
painful, swollen joints that may be symptoms of gout
yellowing of the skin and/or eyes, also known as jaundice
symptoms that may occur if you have developed diabetes, such as excessive thirst, passing greatly increased amounts of urine,
increased appetite with weight loss, feeling tired, drowsy, weak, depressed, irritable and generally unwell
symptoms that may indicate kidney disease such as passing little or no urine, drowsiness, nausea, vomiting, breathlessness,
loss of appetite and weakness
symptoms that may indicate high potassium levels in the blood such as nausea, diarrhoea, muscle weakness and changes in heart
symptoms that may indicate liver disease such as nausea, vomiting, loss of appetite, feeling generally unwell, fever, itching,
yellowing of the skin and eyes and dark coloured urine
disturbances in your vision (such as blurred vision and seeing haloes around lights) and eye pain.
These are serious side effects. Skin rash and itchiness may be symptoms of an allergic reaction.
You may need medical attention. These side effects are not common.
If any of the following happen, stop taking Irbesartan HCT Winthrop and either tell your doctor immediately or go to Accident
and Emergency at your nearest hospital:
swelling to the face, lips, tongue or throat, which may cause difficulty in swallowing or breathing.
severe and a sudden onset of pinkish, itchy swellings on the skin, also called hives or nettlerash.
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 occur in some patients. Tell your doctor or pharmacist if you notice anything that
is making you feel unwell.
After using Irbesartan HCT Winthrop
Keep your Irbesartan HCT Winthrop tablets in the blister pack until it is time to take them.
If you take the tablets out of the blister pack they will not keep well.
Keep Irbesartan HCT Winthrop tablets in a cool dry place where the temperature stays below 25°C. Do not store Irbesartan HCT
Winthrop or any other medicine in the bathroom near a sink. Do not leave them near a radiator, in a car on a hot day or on
a window sill.
Heat and dampness can destroy some medicines.
Keep all medicines out of the reach of children.
A locked cupboard at least one-and-a-half metres above the ground is a good place to store medicines.
If your doctor tells you to stop taking Irbesartan HCT Winthrop or the tablets have passed their expiry date, ask your pharmacist
what to do with any tablets that are left over.
What it looks like
Irbesartan HCT Winthrop 150/12.5 tablets - peach, oval shaped film-coated tablet with a heart shape imprinted on one side
and "2875" engraved on the other side. Blister pack sizes include: 3*, 5*, 7*, 14*, 28*, 30, 56* and 98* tablets.
Irbesartan HCT Winthrop 300/12.5 tablets - peach, oval shaped film-coated tablet with a heart shape imprinted on one side
and "2876" engraved on the other side. Blister pack sizes include: 3*, 5*, 7*, 14*, 28*, 30, 56* and 98* tablets.
Irbesartan HCT Winthrop 300/25 tablets - pink, oval shaped film-coated tablet with a heart shape imprinted on one side and
"2788" engraved on the other side. Blister pack sizes include: 3*, 5*, 7*, 14*, 28*, 30, 56* and 98* tablets.
* presentations currently not marketed.
Irbesartan HCT Winthrop 150/12.5 tablets - 150 mg Irbesartan and 12.5 mg Hydrochlorothiazide per tablet.
Irbesartan HCT Winthrop 300/12.5 tablets - 300 mg Irbesartan and 12.5 mg Hydrochlorothiazide per tablet.
Irbesartan HCT Winthrop 300/25 tablets - 300 mg Irbesartan and 25 mg Hydrochlorothiazide per tablet.
Irbesartan HCT Winthrop 150/12.5 & 300/12.5 tablets also contain carnauba wax, croscarmellose sodium, hypromellose, lactose,
iron oxide red CI 77491, iron oxide yellow CI 77492, macrogol 3000, magnesium stearate, microcrystalline cellulose, silicon
dioxide, and titanium dioxide.
Irbesartan HCT Winthrop 300/25 tablets also contain carnauba wax, croscarmellose sodium, hypromellose, lactose, iron oxide
red CI 77491, iron oxide yellow CI 77492, iron oxide black CI 77499, macrogol 3350, magnesium stearate, microcrystalline cellulose,
silicon dioxide, pregelatinised maize starch, and titanium dioxide.
Irbesartan HCT Winthrop is supplied in Australia by
sanofi-aventis australia pty ltd
12-24 Talavera Road
Macquarie Park, NSW 2113.
Irbesartan HCT Winthrop is a registered sanofi-aventis trademark.
Australian registration number(s):
Irbesartan HCT Winthrop 150/12.5 AUST R 196956
Irbesartan HCT Winthrop 300/12.5 AUST R 196957
Irbesartan HCT Winthrop 300/25 AUST R 196958
This leaflet was prepared on 5 June 2013