Consumer Medicine Information (CMI)
What is in this leaflet
This leaflet answers some common questions about Somac.
It does not contain all the available information. It does not take the place of talking
to your doctor or pharmacist.
The information in this leaflet was last updated on the date listed on the final page.
More recent information on the medicine may be available. You should ensure that you
speak to your pharmacist or doctor to obtain the most up to date information on this
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.
If you have any concerns about using this medicine, ask your doctor or pharmacist.
Keep this leaflet with the medicine.
You may need to read it again.
What Somac is used for
Somac is used to treat and help heal duodenal and gastric 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 of the stomach.
These can be caused in part by too much acid being made in the stomach.
Somac is also used to treat reflux oesophagitis or reflux disease. This can be caused
by “washing back” (reflux) of food and acid from the stomach into the food pipe, also
known as the oesophagus.
Reflux can cause a burning sensation in the chest rising up to the throat, also known
Somac is also used to prevent reflux oesophagitis from coming back.
Somac is used to treat a rare condition called Zollinger-Ellison syndrome, where the
stomach produces very large amounts of acid, much more than in ulcers and reflux disease.
This medicine belongs to a group of medicines called proton pump inhibitors (PPIs).
This medicine works by decreasing the amount of acid the stomach makes to give relief
from the symptoms and allow healing to take place.
Ask your doctor if you have any questions about why it has been prescribed for you.
Your doctor may have prescribed it for another purpose.
This medicine is not addictive.
This medicine is available only with a doctor’s prescription.
This medicine is not expected to affect your ability to drive a car or operate machinery.
However, do not drive a car or operate machines if you experience side effects such
as dizziness or blurred vision.
Before you use Somac
When you must not use it
Do not use Somac if you have an allergy to:
any of the ingredients listed at the end of this leaflet
Some symptoms of an allergic reaction include skin rash, itching, shortness of breath
or swelling of the face, lips or tongue, which may cause difficulty in swallowing
Do not use Somac if you have severe liver disease or cirrhosis.
Do not use Somac in combination with atazanavir or nelfinavir (anti-viral medications).
Do not give Somac injection to children.
Safety and effectiveness in children have not been established.
Do not use it after the expiry date printed on the pack or if the packaging is damaged
or shows signs of tampering.
If it has expired or is damaged return it to your pharmacist for disposal.
Before you start to use it
Tell your doctor if you have any allergies to any other medicines, foods, preservatives
Tell your doctor if you have or have had any other medical conditions.
Tell your doctor if you are pregnant, intend to become pregnant, or are breastfeeding.
Your doctor can discuss the risks and benefits involved.
If you have not told your doctor about any of the above, tell them before you use
Tell your doctor if you have any of the following symptoms:
unintentional weight loss
difficulty or pain when swallowing
you look pale and feel weak
you notice blood in your stools
Your doctor may need to perform some additional tests before you take Somac Injection.
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.
Some medicines and Somac Injection may interfere with each other. These include
warfarin, phenprocoumon - medicines used to prevent blood clots (anticoagulants)
ketoconazole, itraconazole, posaconazole - medicines used to treat fungal infection
atazanavir, nelfinavir – medicines used to treat viral infections such as HIV
methotrexate - a medicine used to treat arthritis and some types of cancer
erlotinib or related medicines used to treat cancer
tacrolimus, mycophenolate mofetil - medicines used to suppress the immune system
fluvoxamine - a medicine used to treat anxiety and depression
These medicines may be affected by Somac Injection, or may affect how well it works.
You may need to use different amounts of your medicine, or take different medicines.
Your doctor has more information on medicines to be careful with or to avoid while
taking Somac Injection.
How to use Somac Injection
Follow all directions given to you by your doctor or pharmacist carefully.
They may differ from the information contained in this leaflet.
If you do not understand the instructions on the box, ask your doctor or pharmacist
How much to use and when to use it
The dose and frequency of your Somac Injection will be determined by your doctor and
will depend on your medical condition. Your doctor may change the dose as your condition
How to use it
Somac Injection is reconstituted with sodium chloride solution by your doctor or pharmacist.
How long to use it
Continue using your medicine for as long as your doctor tells you.
Your doctor will determine how long you need to be treated with Somac Injection.
If a dose is missed
If a dose of Somac Injection is missed, your doctor will determine when your next
dose is due.
If too much is given (overdose)
Your doctor will ensure that you receive the correct dose of Somac Injection.
Never administer this medicine to yourself.
Overdose is unlikely with Somac. However it may cause an increase in side effects.
(The side effects are listed under the heading, 'Side effects' in this leaflet.)
While you are using Somac Injection
Things you must do
If you are about to be started on any new medicine, remind your doctor and pharmacist
that you are being treated with Somac Injection.
Tell any other doctors, dentists and pharmacists who treat you that you are being
given Somac Injection.
If you are about to have any blood tests, tell your doctor that you are taking this
It may interfere with the results of some tests.
If you become pregnant while you are being given this medicine, tell your doctor immediately.
Keep all of your doctor’s appointments so that your progress can be checked.
Your doctor may do some tests from time to time to make sure the medicine is working
and to prevent unwanted side effects.
Tell your doctor as soon as possible if you do not feel well while you are given Somac
Injection. All medicines have some unwanted side effects. Sometimes they are serious,
but most of the time they are not. You may need medical attention if you get some
of the side-effects.
Do not be alarmed by this list of possible side effects. You may not experience any
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:
nausea or vomiting
excessive gas in the stomach or bowel
increased sweating or body temperature
pain and swelling at the site of injection
weakness or tiredness
skin problems such as itchiness and rash
The above list includes the more common side effects of your medicine. They are usually
mild and short-lived.
Tell your doctor as soon as possible if you notice any of the following:
unusual tiredness or weakness
nausea, vomiting, loss of appetite, feeling generally unwell, fever, itching, yellowing
of the skin and eyes, and dark coloured urine
blood in the urine
increased or decreased need to urinate
skin problems such as itchiness, rash with swelling, blistering or peeling of the
skin or rash when exposed to the sun, possibly with pain in the joints
swelling of the face, lips, mouth, tongue or throat which may cause difficulty in
swallowing or breathing
frequent infections such as fever, severe chills, sore throat or mouth ulcers
shortness of breath
high blood pressure
water retention, swelling
bleeding or bruising more easily than normal
depression, confusion or anxiety
bone fracture of the hip, wrist or spine (mainly a risk in people who take high doses
of PPIs or use them long term (a year or longer))
symptoms such as seizures, abnormal or fast heartbeat or jerking/shaking movements.
These can be a sign of low magnesium levels in your blood
severe and/or persistent diarrhoea, because this medicine has been associated with
a small increase in infectious diarrhoea
The above list includes serious side effects that may require medical attention.
Serious side effects are rare. Tell your doctor if you notice anything else that is
making you feel unwell.
Other side effects not listed above may occur in some people. Some of these side effects
can only be found when your doctor does tests from time to time to check your progress.
After using Somac
Normally your doctor will provide your Somac Injection. If however, you do take your
Somac Injection from the pharmacy to your doctor, it is important to store it in a
safe place away from heat (below 25°C) and away from light. Do not leave your Somac
Injection in a car.
If for any reason you take your Somac Injection home, use as soon as possible after
preparation. If storage is necessary, store at 2-8°C for no longer than 12 hours.
When taking Somac Injection at home, always ensure that it is stored in a place where
children cannot reach it i.e. a locked cupboard at least one-and-a-half meters (5
feet) above the ground is a good place to store medicine.
If your doctor stops treating you with Somac Injection, your hospital pharmacist will
dispose of any unused medicine.
What it looks like
Somac Injection is available as 40 mg injection. Somac Injection is a white to off-white
powder provided in a glass vial.
The active ingredient in Somac Injection is pantoprazole.
The inactive ingredients are:
Somac Injection is supplied in Australia by:
Takeda Pharmaceuticals Australia Pty Ltd
2 Chifley Square
Sydney NSW 2000
Ph: 1800 675 957
Australian Registration Number
AUST R 121427
® Registered Trademark of Takeda GmbH
This leaflet was prepared in April 2017