Contains the active ingredient omeprazole
Consumer Medicine Information
What is in this leaflet
Read this leaflet carefully before taking your medicine.
This leaflet answers some common questions about omeprazole. It does not contain all
the available information. It does not take the place of talking to your doctor or
The information in this leaflet was last updated on the date listed on the last page.
More recent information on this medicine may be available.
Ask your doctor or pharmacist:
if there is anything you do not understand in this leaflet,
if you are worried about taking your medicine, or
to obtain the most up-to-date information.
You can also download the most up to date leaflet from www.apotex.com.au.
All medicines have risks and benefits. Your doctor has weighed the risks of you using
this medicine against the benefits they expect it will have for you.
Pharmaceutical companies cannot give you medical advice or an individual diagnosis.
Keep this leaflet with your medicine. You may want to read it again.
What this medicine is used for
The name of your medicine is APO- Omeprazole. It contains the active ingredient omeprazole.
It is used to treat:
Omeprazole is used to treat the symptoms of reflux oesophagitis or reflux disease.
This can be caused by "washing back" (reflux) of food and acid from the stomach into
the food pipe (oesophagus).
Reflux can cause a burning sensation in the chest rising up to the throat, also known
Omeprazole is also used to help stop reflux oesophagitis coming back or relapsing.
Omeprazole is used to treat peptic ulcers. Depending on the position of the ulcer
it is called a gastric or duodenal ulcer. A gastric ulcer occurs in the stomach. A
duodenal ulcer occurs in the duodenum, which is the tube leading out from the stomach.
These ulcers can be caused by too much acid being made in the stomach.
Omeprazole is also used to help stop peptic or duodenal ulcers coming back.
Peptic Ulcers Associated with Helicobacter pylori Infection
Helicobacter pylori is a bacteria that often occurs in the stomach together with peptic
When omeprazole is taken together with an antibiotic, they work together to kill the
bacteria and let your ulcer heal. You may need further treatment with antibiotics.
Peptic Ulcers Associated with Non-Steroidal Anti-Inflammatory Drugs (NSAIDs)
Some peptic ulcers are caused by taking medicines called non-steroidal anti-inflammatory
drugs (NSAIDs), a type of medicine used to treat pain, swelling or inflammation, including
arthritis and joint pain.
Omeprazole is used to treat and help to prevent ulcers developing, which are associated
with long-term use of NSAIDs.
Omeprazole is also used to treat a rare condition called Zollinger-Ellison syndrome,
where the stomach produces large amounts of acid, much more than in ulcers or reflux
Ask your doctor if you have any questions about why this medicine has been prescribed
for you. Your doctor may have prescribed this medicine for another reason.
This medicine is available only with a doctor's prescription.
How it works
Omeprazole belongs to a group of medicines called proton-pump inhibitors.
It works by decreasing the amount of acid made by the stomach, to give relief of symptoms
and allow healing to take place. This does not stop food being digested in the normal
There is no evidence that this medicine is addictive.
Use in children
This medicine should not be used in children.
Before you take this medicine
When you must not take it
Do not take this medicine if:
You are taking a medication containing cilostazol.
You are pregnant.
Omeprazole may affect your developing baby if you take it during pregnancy.
You are breast-feeding.
Omeprazole may pass into human breast milk.
The expiry date (EXP) printed on the pack has passed.
The packaging is torn, shows signs of tampering or it does not look quite right.
You have had an allergic reaction to omeprazole or any of the ingredients listed at
the end of this leaflet.
Symptoms of an allergic reaction may include cough, shortness of breath, wheezing
or difficulty breathing; swelling of the face, lips, tongue, throat or other parts
of the body, rash, itching or hives on the skin; fainting or hayfever-like symptoms.
If you think you are having an allergic reaction, do not take any more of the medicine
and contact your doctor immediately or go to the Accident and Emergency department
at the nearest hospital.
Before you start to take it
Before you start taking this medicine, tell your doctor if:
1. You have allergies to:
any other medicines
any other substances, such as foods, preservatives or dyes.
2. You have or have had any medical conditions, especially the following:
any problems with your liver or its enzymes
have experienced significant unintentional weight loss, recurring vomiting with or
without blood, trouble swallowing or black faeces
risk of osteoporosis.
3. You are currently pregnant or you plan to become pregnant.
Do not take this medicine whilst pregnant until you and your doctor have discussed
the risks and benefits involved.
4. You are currently breast-feeding or you plan to breast-feed.
Do not take this medicine whilst breast-feeding until you and your doctor have discussed
the risks and benefits involved.
5. You are planning to have surgery or an anaesthetic.
6. You are taking or are planning to take any other medicines.
This includes vitamins and supplements that are available from your pharmacy, supermarket
or health food shop.
Some medicines may interact with omeprazole. These include:
phenytoin - a medicine used to treat epilepsy for fits
warfarin - a medicine used to prevent blood clots
clopidogrel - is used to prevent blood clots forming in hardened blood vessels
diazepam - a medicine used to treat anxiety and other conditions
St John's wort - a herbal remedy used to treat mood disorders
ketoconazole, itraconazole, voriconazole - medicines used to treat fungal infection
clarithromycin or rifampicin - medicines used to treat bacterial infections
atazanavir and nelfinavir - medicines used to treat viral infections, such as HIV
tacrolimus or mycophenolate mofetil - medicines used to assist in organ transplants
digoxin - a medicine used to treat abnormal heart rhythms
cilostazol - a blood thinner used to treat intermittent claudication and improve walking
methotrexate - a medicine used to treat arthritis and some types of cancers
erlotinib or related medicines - used to treat cancer.
If you are taking any of these you may need a different dose or you may need to take
Other medicines not listed above may also interact with omeprazole.
How to take this medicine
Follow carefully all directions given to you by your doctor or pharmacist. Their instructions
may be different to the information in this leaflet.
How much to take
Your doctor or pharmacist will tell you how much of this medicine you should take.
The usual dose is 20 mg once a day. The dose may vary from 10 mg to 40 mg a day depending
on what condition you are being treated for and how severe it is. This may also depend
whether you are taking any other medicines.
Do not stop taking your medicine or change your dosage without first checking with
When to take it
Take this medicine at the same time each day. Taking it at the same time each day
will have the best effect and will also help you remember when to take it.
It does not matter if you take it before, with or after food.
How long to take it for
In most patients, omeprazole relieves symptoms rapidly and healing is usually complete
within 4 weeks. Continue taking your medicine for as long as your doctor tells you.
Make sure you have enough to last over weekends and holidays.
If you forget to take it
If it is almost time to take your next dose, skip the missed dose and take your next
dose at the usual time. Otherwise take it as soon as you remember and then go back
to taking your medicine as you would normally.
Do not take a double dose to make up for missed doses.
This may increase the chance of you experiencing side effects.
If you have trouble remembering to take your medicine, ask your pharmacist for some
hints to help you remember.
If you take too much (overdose)
If you think that you or anyone else may have taken too much of this medicine, immediately
telephone your doctor or the Poisons Information Centre (Tel: 13 11 26 in Australia)
for advice. Alternatively go to the Accident and Emergency Department at your nearest
Do this even if there are no signs of discomfort or poisoning. You may need urgent
While you are taking this medicine
Things you must do
Tell your doctor that you are taking this medicine if:
you are about to be started on any new medicine
you are pregnant or are planning to become pregnant
you are breast-feeding or are planning to breast-feed
you are about to have any blood tests
you are going to have surgery or an anaesthetic or are going into hospital.
Your doctor may occasionally do tests to make sure the medicine is working and to
prevent side effects. Go to your doctor regularly for a check-up.
Tell any other doctors, dentists and pharmacists who are treating you that you take
Things you must not do
Give this medicine to anyone else, even if their symptoms seem similar to yours
Take your medicine to treat any other condition unless your doctor or pharmacist tells
Stop taking your medicine, or change the dosage, without first checking with your
Things to be careful of
Be careful when driving or operating machinery until you know how this medicine affects
Possible side effects
Tell your doctor or pharmacist as soon as possible if you do not feel well while you
are taking omeprazole or if you have any questions or concerns.
Do not be alarmed by the following lists of side effects. You may not experience any
of them. All medicines can have side effects. Sometimes they are serious but most
of the time they are not.
Tell your doctor or pharmacist if you notice any of the following and they worry you.
This list includes the more common side effects. Mostly, these are mild:
Tell your doctor as soon as possible if you notice any of the following.
These may be serious side effects. You may need medical attention. Most of these side
effects are rare.
muscle pain, joint pain or weakness
"pins and needles" (tingling or numbness) in the hands and feet
changes in sleep patterns
mood changes, confusion or depression
increase in breast size (males)
fever, vomiting and abdominal cramps accompanied by diarrhoea with or without blood
increased bruising, or bleeding more easily
disturbance in vision or hearing.
If you experience any of the following, stop taking your medicine and contact your
doctor immediately or go to the Accident and Emergency department at your nearest
These are very serious side effects and are usually very rare. You may need urgent
medical attention or hospitalisation.
swelling of the face, lips, mouth, tongue or throat, which may cause difficulty in
skin reaction, which may include rash, itching, redness, blistering or peeling of
swelling of feet, hands and ankles
ulcers, blisters of bleeding of the lips, eyes, mouth, nose and genitals
blood in urine
signs of liver inflammation including yellowing of the skin or eyes, generally feeling
unwell, nausea, vomiting, loss of appetite
Other side effects not listed above may occur in some patients.
If you think you are having an allergic reaction to omeprazole, do not take any more
of this medicine and tell your doctor immediately or go to the Accident and Emergency
department at your nearest hospital.
Symptoms of an allergic reaction may include some or all of the following:
cough, shortness of breath, wheezing or difficulty breathing
swelling of the face, lips, tongue, throat or other parts of the body
rash, itching or hives on the skin
Storage and disposal
Keep your medicine in its original packaging until it is time to take it.
If you take your medicine out of its original packaging it may not keep well.
Keep your medicine in a cool dry place where the temperature will stay below 25°C.
Do not store your medicine, or any other medicine, in the bathroom or near a sink.
Do not leave it on a window sill or in the car. Heat and dampness can destroy some
Keep this medicine 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 this medicine or it has passed
its expiry date, your pharmacist can dispose of the remaining medicine safely.
What APO-Omeprazole looks like
20 mg omeprazole is a red brown, oblong, enteric coated tablet.
Each tablet contains 20 mg of omeprazole as the active ingredient.
It also contains the following inactive ingredients:
iron oxide red
iron oxide black
This medicine is gluten-free, sucrose-free, tartrazine-free and free of other azo
APO-Omeprazole is available in:
Blister packs and bottles of 30 tablets.
Not all pack types may be available.
Australian Registration Numbers
APO-Omeprazole 20 mg tablet (blister pack): AUST R 243812.
APO-Omeprazole 20 mg tablet (bottles): AUST R 243813.
Apotex Pty Ltd
16 Giffnock Avenue
Macquarie Park NSW 2113
APO and APOTEX are registered trademarks of Apotex Inc.
This leaflet was last updated in: June 2019.