Consumer medicine information

Irbesartan/HCT Sandoz® Tablets

Irbesartan/HCT Sandoz® Tablets

Active ingredient(s): irbesartan and hydrochlorothiazide

Consumer Medicine Information (CMI)

This leaflet provides important information about using Irbesartan/HCT Sandoz. You should also speak to your doctor or pharmacist if you would like further information or if you have any concerns or questions about using Irbesartan/HCT Sandoz.

Where to find information in this leaflet:

1. Why am I taking Irbesartan/HCT Sandoz?
2. What should I know before I take Irbesartan/HCT Sandoz?
3. What if I am taking other medicines?
4. How do I take Irbesartan/HCT Sandoz?
5. What should I know while taking Irbesartan/HCT Sandoz?
6. Are there any side effects?
7. Product details

1. Why am I taking Irbesartan/HCT Sandoz?

Irbesartan/HCT Sandoz contains the active ingredient 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.

Irbesartan/HCT Sandoz is used to treat high blood pressure, which doctors call hypertension.

2. What should I know before I take Irbesartan/HCT Sandoz?


Do not use Irbesartan/HCT Sandoz if:

  • you are allergic to irbesartan, hydrochlorothiazide or to sulfonamide derived medicines (commonly known as sulfur drugs), or any of the ingredients listed at the end of this leaflet. Always check the ingredients to make sure you can take this medicine.
  • you are pregnant (or think you may be pregnant) or are planning to become pregnant.
  • you are breast-feeding.
  • you have diabetes or have kidney problems and you are being treated with medicines that lower blood pressure such as an ACE inhibitor, any aliskiren-containing medicines that belong to a group of medicines known as AIIRAs (medicines also used to treat high blood pressure).
  • you are not producing urine.

Check with your doctor if you:

  • have any other medical conditions
  • have had recent excessive vomiting or diarrhea or think you are dehydrated
  • have kidney problems, or have had a kidney transplant or dialysis
  • have heart problems
  • have liver problems, or have had liver problems in the past
  • have diabetes
  • have gout or have had gout in the past
  • have lupus erythematosus
  • have high or low levels of potassium or sodium or other electrolytes in your blood
  • have primary aldosteronism. This is a condition which causes sodium retention and an increase in blood pressure
  • are strictly restricting your salt intake
  • have had a sympathectomy. This is a surgical procedure to cut or block a nerve in your body.
  • have been taking diuretics. These are medicines that reduce fluid retention in your body and are often used to treat high blood pressure.
  • have had skin cancer or you develop an unexpected skin lesion during the treatment. Treatment with hydrochlorothiazide, particularly long term use with high doses, may increase the risk of some types of skin and lip cancer (non-melanoma skin cancer). Protect your skin from sun exposure and UV rays while taking Irbesartan/HCT Sandoz
  • take any medicines for any other condition
  • are pregnant or intend to become pregnant
  • if you are breast-feeding or plan to breastfeed
  • plan to have surgery (even at the dentist) that needs a general anaesthetic
  • have a history of allergy or asthma
  • have allergies to any substances, such as foods, preservatives or dyes.
  • have a decrease in your vision or pain in one or both of your eyes. If so, you should discontinue Irbesartan/ HCT Sandoz tablet treatment and seek prompt medical attention, as these could be symptoms of fluid accumulation in the eye (choroidal effusion) or an increase of pressure in your eye (glaucoma) and can happen within hours to weeks of taking Irbesartan/ HCT Sandoz tablets. This can lead to permanent vision loss, if not treated. If you have had a penicillin or sulfonamide (sulfur drug) allergy, you can be at higher risk of developing this.
  • experienced breathing or lung problems (including inflammation or fluid in the lungs) following hydrochlorothiazide intake in the past.

During treatment, you may be at risk of developing certain side effects. It is important you understand these risks and how to monitor for them. See additional information under Section 6. Are there any side effects?

Use in children

Irbesartan/HCT Sandoz should not be given to children.

Pregnancy and breastfeeding

Check with your doctor if you are pregnant or intend to become pregnant. Do not take Irbesartan/HCT Sandoz if you are pregnant or intend to become pregnant.

Talk to your doctor if you are breastfeeding or intend to breastfeed. Do not take Irbesartan/HCT Sandoz if you are breastfeeding.

3. What if I am taking other medicines?

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

Tell your doctor if you are taking or plan to take any of the following:

  • other medicines to treat high blood pressure
  • other diuretics
  • lithium or lithium-containing medicines (for example lithium carbonate)
  • potassium tablets
  • potassium-containing salt tablets
  • non-steroidal anti-inflammatory medicine such as diclofenac, ibuprofen) and COX-2 inhibitors (for example celecoxib) These medicines may be used to relieve pain, swelling and other symptoms of inflammation including arthritis. Taking irbesartan and an anti-inflammatory medicine alone or with a thiazide diuretic (fluid tablet) may damage your kidneys. It may also reduce the effect irbesartan has on lowering blood pressure.
  • alcoholic drinks
  • sleeping tablets
  • strong pain medicines such as codeine or morphine
  • medicines to treat diabetes, such as repaglinide. Irbesartan/HCT Sandoz might induce hypoglycaemia; low blood sugar.
  • calcium supplements or medicines containing calcium
  • medicines containing Vitamin D
  • medicines for gout
  • powder or granules used to help reduce cholesterol (cholestyramine or colestipol hydrochloride)
  • heart medicines such as digoxin or medicines to treat abnormal heart rhythm such as sotalol hydrochloride
  • corticosteroid medicines such as prednisone, cortisone or adrenocorticotropic hormone (ACTH)
  • medicines used to treat cancer
  • 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, a medicine used to treat convulsion
  • medicines used during surgery
  • medicines used in an emergency such as adrenaline

Check with your doctor or pharmacist if you are not sure about what medicines, vitamins or supplements you are taking and if these affect Irbesartan/HCT Sandoz.

4. How do I take Irbesartan/HCT Sandoz?

How much to take

  • Irbesartan/HCT Sandoz 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 Sandoz
  • The usual dose of Irbesartan/HCT Sandoz is one tablet once a day. The full blood pressure lowering effect should be reached 6 to 8 weeks after beginning treatment.
  • If your blood pressure is not satisfactorily reduced with Irbesartan/HCT Sandoz, your doctor may prescribe another medicine to be taken with Irbesartan/HCT Sandoz
  • Ask your doctor or pharmacist if you are unsure of the correct dose for you. They will tell you exactly how much to take.
  • Follow the instructions provided and take Irbesartan/HCT Sandoz until your doctor tells you to stop.

When to take Irbesartan/HCT Sandoz

  • Take Irbesartan/HCT Sandoz at about the same time each day.

How to take Irbesartan/HCT Sandoz

  • Swallow the tablet whole with a glass of water. It does not matter whether you take Irbesartan/HCT Sandoz tablets before or after food.
  • Continue taking Irbesartan/HCT Sandoz until your doctor tells you to stop.
  • To help you remember to take your tablets each day, Irbesartan/HCT Sandoz 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” at the end of the blister strip. 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 as before.

If you forget to take Irbesartan/HCT Sandoz

Irbesartan/HCT Sandoz should be used regularly at the same time each day.

If you miss your dose at the usual time and 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.

If you take too much Irbesartan/HCT Sandoz

If you think that you have used too much Irbesartan/HCT Sandoz, you may need urgent medical attention.

You should immediately:

  • phone the Poisons Information Centre
    (by calling 13 11 26), or
  • contact your doctor, or
  • go to the Emergency Department at your nearest hospital.

You should do this even if there are no signs of discomfort or poisoning.

If you take too many Irbesartan/HCT Sandoz tablets you will feel light-headed or dizzy.

5. What should I know while taking Irbesartan/HCT Sandoz?

Things you should do

  • Tell any other doctors, dentists, and pharmacists who are treating you that you are taking Irbesartan/HCT Sandoz.
  • Tell your doctor immediately if you become pregnant while taking Irbesartan/HCT Sandoz.
  • Have your blood pressure checked when your doctor tells you to, to make sure Irbesartan/HCT Sandoz is working
  • If you are about to be started on any new medicine, tell your doctor and pharmacist that you are taking Irbesartan/HCT Sandoz.
  • If you plan to have surgery that needs a general anaesthetic, tell your doctor or dentist that you are taking Irbesartan/HCT Sandoz. Your blood pressure may drop suddenly.
  • Make sure you drink enough water during exercise and hot weather when you are taking Irbesartan/HCT Sandoz, especially if you sweat a lot. If you do not drink enough water while taking Irbesartan/HCT Sandoz, 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.
  • Tell your doctor if you have excessive vomiting and/or diarrhoea while taking Irbesartan/HCT Sandoz. You may lose too much water and salt and your blood pressure may drop too much.
  • Tell your doctor immediately if you feel lightheaded or dizzy after taking your first dose of Irbesartan/HCT Sandoz, or when your dose is increased.
  • Tell your doctor if you experience an increased sensitivity of the skin to the sun with symptoms of sunburn (such as redness, itching, swelling, blistering) occurring more quickly than normal.
  • If you develop any shortness of breath or difficulty breathing after taking Irbesartan/HCCT Sandoz, seek medical attention immediately.

Things you should not do

  • Do not give Irbesartan/HCT Sandoz tablets to anyone else, even if they have the same condition as you.
  • Do not take Irbesartan/HCT Sandoz to treat any other complaints unless your doctor or pharmacist tells you to.
  • Do not stop taking Irbesartan/HCT Sandoz, 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.
  • The hydrochlorothiazide contained in this medicine could produce a positive analytical result in an antidoping test.

Driving or using machines

Be careful before you drive or use any machines or tools until you know how Irbesartan/HCT Sandoz affects you.

As with many other medicines used to treat high blood pressure, Irbesartan/HCT Sandoz, may cause dizziness or lightheadedness in some people. If this occurs do not drive.

Make sure you know how you react to Irbesartan/HCT Sandoz before you drive a car, operate machinery or do anything else that could be dangerous if you are dizzy or light-headed.

Drinking alcohol

Tell your doctor if you drink alcohol.

If you drink alcohol, dizziness or light-headedness may be worse.

Looking after your medicine

  • Keep Irbesartan/HCT Sandoz tablets in a cool dry place where the temperature stays below 25°C.
  • Keep your tablets in the blister pack until it is time to take them.

Follow the instructions in the carton on how to take care of your medicine properly.

Store it in a cool dry place away from moisture, heat or sunlight; for example, do not store it:

  • in the bathroom or near a sink, or
  • in the car or on window sills.

Keep it where young children cannot reach it.

Getting rid of any unwanted medicine

If you no longer need to use this medicine or it is out of date, take it to any pharmacy for safe disposal.

Do not use this medicine after the expiry date.

6. Are there any side effects?

All medicines can have side effects. If you do experience any side effects, most of them are minor and temporary. However, some side effects may need medical attention.

See the information below and, if you need to, ask your doctor or pharmacist if you have any further questions about side effects.

Less serious side effects

Less serious side effects What to do
  • headache
  • dizziness or light-headedness (vertigo)
  • unusual tiredness or weakness, fatigue
  • shortness of breath when exercising or looking pale
  • pain in the stomach or gut
  • nausea and/or vomiting
  • sexual problems
  • low blood glucose levels
Speak to your doctor if you have any of these less serious side effects and they worry you.
They are generally mild and do not normally require treatment to be interrupted.

Serious side effects

Serious side effects What to do
  • skin rash or itchiness (this may be a symptom of an allergic reaction).
  • aching muscles, not caused by exercise
  • muscle pain or weakness
  • blood tests may show raised measures breakdown of muscle (creatinine phosphokinase)
  • buzzing, ringing or other persistent noise in the ear
  • 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
  • fainting
  • symptoms that may indicate low platelet count such as easy or excessive bruising, bleeding from gums or nose, prolonged bleeding from cuts and blood in urine or stools
  • disturbances in your vision (such as blurred vision and seeing haloes around lights) and eye pain
  • 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 rhythm
  • yellowing of the skin and/or eyes, also known as jaundice
  • 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
  • swelling of the face, lips, tongue or throat which may cause difficulty in swallowing or breathing
  • severe and sudden onset of pinkish, itchy swellings on the skin, also called hives or nettle rash
  • acute respiratory distress (signs include shortness of breath, fever, weakness, and confusion)
Stop taking Irbesartan/HCT Sandoz and call your doctor straight away, or go straight to the Emergency Department at your nearest hospital if you notice any of these serious side effects.
These are very serious side effects.
You may need urgent medical attention or hospitalization.
These side effects are very rare.

Tell your doctor or pharmacist if you notice anything else that may be making you feel unwell.

Other side effects not listed here may occur in some people.

Reporting side effects

After you have received medical advice for any side effects you experience, you can report side effects to the Therapeutic Goods Administration online at By reporting side effects, you can help provide more information on the safety of this medicine.

Always make sure you speak to your doctor or pharmacist before you decide to stop taking any of your medicines.

7. Product details

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

What Irbesartan/HCT Sandoz contains

Active ingredient
(main ingredient)

Irbesartan/HCT Sandoz 150 mg/12.5 mg – 150 mg irbesartan and 12.5 mg hydrochlorothiazide.

Irbesartan/HCT Sandoz 300 mg/12.5 mg – 300 mg irbesartan and 12.5 mg hydrochlorothiazide.

Irbesartan/HCT Sandoz 300 mg/25 mg – 300 mg irbesartan and 25 mg hydrochlorothiazide.

Other ingredients
(inactive ingredients)
  • microcrystalline cellulose
  • lactose monohydrate
  • croscarmellose sodium
  • colloidal anhydrous silica
  • hypromellose
  • magnesium stearate
  • hyprolose
  • macrogol 6000
  • titanium dioxide
  • talc
  • iron oxide red (CI77491)
  • iron oxide yellow (CI77492) – Irbesartan/HCT Sandoz 150 mg/12.5 mg and 300 mg/12.5 mg only
  • iron oxide black (CI77499) – Irbesartan/HCT Sandoz 300 mg/25 mg only.
Potential allergens lactose

Do not take this medicine if you are allergic to any of these ingredients.

What Irbesartan/HCT Sandoz looks like

Irbesartan/HCT Sandoz 150 mg/12.5 mg tablets – apricot, oval biconvex film-coated tablet, debossed with 150H on one side. Pack size: 30 tablets (AUST R 174729).

Irbesartan/HCT Sandoz 300 mg/12.5 mg – apricot, oval biconvex film-coated tablet, debossed with 300H on one side. Pack size: 30 tablets (AUST R 174724).

Irbesartan/HCT Sandoz 300 mg/25 mg – dark pink, oval biconvex film-coated tablet, debossed with 300 on one side and 25H on the other side. Pack size: 30 tablets (AUST R 174731).

Who distributes Irbesartan/HCT Sandoz

Sandoz Pty Ltd
ABN 60 075 449 553
54 Waterloo Road
Macquarie Park NSW 2113
Tel: 1800 726 369

Novartis New Zealand Ltd
PO Box 99102
Newmarket, Auckland 1149
New Zealand
Tel: 0800 354 335

This leaflet was revised in November 2022.