contains the active ingredient peginterferon alfa-2a
Consumer Medicine Information
What is in this leaflet
This leaflet answers some common questions about Pegasys pre-filled syringes.
It does not contain all the available information.
It 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 using
Pegasys 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 Pegasys is used for
Pegasys contains the active ingredient peginterferon alfa-2a.
Pegasys belongs to a group of medicines called interferons. Pegasys is a long-acting
Interferons are proteins that modify the response of the body's immune system to help
fight infections and severe diseases.
Pegasys is used to treat chronic hepatitis B or C, which are viral infections of the
If these viral infections are not managed, in some people, the liver becomes badly
damaged and scarred. This is called cirrhosis. Cirrhosis can cause the liver to stop
Cirrhosis can also be caused by things other than viral infections such as long-term
It is not known if Pegasys can prevent liver failure or liver cancer that is caused
by hepatitis infection.
Most people who get hepatitis B or C carry the virus in their blood for the rest of
their lives, unless successfully treated. Most of these people will have some liver
damage, but not all feel sick from the disease.
For chronic hepatitis B, Pegasys is usually used alone.
For chronic hepatitis C, Pegasys is best used in combination with ribavirin tablets.
If you are given Pegasys in combination therapy, you should also read the ribavirin
Consumer Medicine Information leaflet before use.
Pegasys is used alone for chronic hepatitis C only if you cannot take ribavirin tablets
for any reason.
Pegasys treatment will not prevent a hepatitis B or C infected person from giving
another person hepatitis B or C.
There are many different types of medicines used to treat chronic hepatitis B or C.
Your doctor, however, may have prescribed Pegasys for another purpose.
Ask your doctor if you have any questions why Pegasys has been prescribed for you.
Pegasys is not addictive.
This medicine is available only with a doctor's prescription.
Before you use Pegasys
When you must not use it
Do not use Pegasys if:
1. you have had an allergic reaction to alfa interferons, E.coli-derived products, polyethylene
glycol or any of the ingredients listed at the end of this leaflet
Some symptoms of an allergic reaction include:
hives or skin rash
swelling of the face, lips or tongue
wheezing or troubled breathing
2. you have autoimmune hepatitis
3. you have decompensated cirrhosis (severe liver disease)
4. you have severe heart problems or any previous heart conditions
5. you are breast-feeding or plan to breast-feed
It is not known whether Pegasys or ribavirin passes into breast milk. Your doctor
will advise you.
6. you are HIV co-infected with cirrhosis (Child-Pugh score of 6 or more)
7. the package is torn or shows signs of tampering
8. the expiry date (EXP) printed on the pack has passed
If you use this medicine after the expiry date has passed it may not work as well.
Do not use Pegasys with ribavirin if:
1. you have blood disorders including anaemia (low number of red blood cells), thalassaemia
2. you are pregnant or your female partner is pregnant (if you are male).
Ribavirin may cause birth defects and/or death of an unborn baby. Extreme care must
be taken to avoid pregnancy during treatment and for 6 months after completion of
treatment. Effective contraception must be used during this time.
Before starting Pegasys, you should talk to your doctor about the possible benefits
and possible side effects of treatment, to decide if Pegasys is right for you. While
taking Pegasys you will need to see your doctor regularly for medical examinations
and blood tests to make sure your treatment is working and to check for side effects.
Use in children
Do not give Pegasys to children under 18 years of age.
Safety and effectiveness in children have not been established.
Delayed growth and development has been reported in children under 18 years of age.
This product contains benzyl alcohol and should not be given to babies from birth
up to the age of 3 years.
Before you start to use it
Your doctor must know all about the following before you start to use Pegasys.
Tell your doctor if:
1. you are pregnant or plan to become pregnant
It is not known whether Pegasys is harmful to an unborn baby when used by a pregnant
woman. If there is a need to use Pegasys when you are pregnant, your doctor will discuss
the risks and benefits to you and the unborn baby.
2. you are breast-feeding or plan to breast-feed
It is not known whether Pegasys passes into the breast milk. Your doctor will discuss
the risks and benefits of using Pegasys if you are breast-feeding.
3. you have ever had any of the following medical conditions, tell your doctor before
you start taking Pegasys:
current, or a history of, depression (feeling low)
history of injecting drug use or excessive alcohol use
history of heart disease or previous heart attack
autoimmune disease (where the body's immune system attacks the body's own cells),
such as psoriasis (a skin disease)
diabetes (high blood sugar)
problems with the thyroid gland
liver problems, other than hepatitis B or C
4. you have HIV infection and are being treated with anti-HIV medicines
5. if you are under 18 years of age
Delayed growth and development has been reported in children under 18 years of age.
6. if you are under 18 years of age and have current, or a history of, depression (feeling
7. if you are allergic to any other medicines, foods, dyes or preservatives
Taking other medicines
Tell your doctor if you are taking any other medicines including any that you have
bought without a prescription from a pharmacy, supermarket or health food shop.
You must tell your doctor if you are taking:
theophylline, a medicine used to treat asthma, bronchitis and emphysema
Sho-saiko-to, a Chinese herbal medicine, also known as Xiao-Chai-Hu-Tang
methadone, used to treat opioid dependence
didanosine, stavudine, or zidovudine, medicines used to treat HIV/AIDS
telbivudine, a medicine used to treat hepatitis B infection
azathioprine, a medicine used to suppress the immune system.
Some medicines may interfere with Pegasys or may affect how well it works. You may
need to use different amounts of your medicine, or you may need to take different
medicines. Your doctor will advise you.
Your doctor or pharmacist has more information on medicines to be careful with or
avoid while using Pegasys.
Ask your doctor or pharmacist if you are not sure about this list of medicines.
How to use Pegasys
Follow all directions given to you by your doctor carefully.
They may differ from the information contained in this leaflet.
How much to inject
Your doctor will tell you how much Pegasys to inject according to your individual
Pegasys, whether given alone or in combination with ribavirin tablets, is usually
administered as a 180 mcg per 0.5 mL injection once a week for 24 to 72 weeks depending
on the type of virus you are infected with and any previous treatment you have had.
If necessary, your dose may be changed by your doctor during therapy according to
Your doctor will keep track of your response to Pegasys by asking questions and performing
occasional laboratory tests.
Do not exceed or change the dose recommended by your doctor.
How to inject it
Pegasys is administered by subcutaneous injection. This means that Pegasys is injected
with a short needle into the fatty tissue just under the skin in the stomach or thigh.
Your doctor may discuss whether it would be more convenient for you to receive your
injection at home, in which case, you or a family member would be instructed on how
to give the injection. This is a simple procedure and many patients prefer it.
If your doctor has directed you to use Pegasys by subcutaneous injection at home,
please follow the instructions below. Your doctor or nurse will usually show you
how to inject Pegasys.
Directions for self-injection
You should read these directions from beginning to end before starting so that each
step of the procedure becomes familiar. These instructions must be carefully followed.
Consult your doctor or nurse if you require further instructions.
Remember that cleanliness is vital.
1. Preparing to self-inject
Before you begin:
Wash your hands thoroughly
Find a clean, comfortable area
Gather all the medicinal supplies you will need:
An alcohol swab
One Pegasys pre-filled syringe and unused injection needle
Some cotton wool
A sharps disposal bin
Check the expiry date. Do not use Pegasys after the expiry date shown on the pre-filled
Check the liquid has no discolouration, cloudiness or particles. The liquid should
look clear and colourless to slightly yellow
Remove the Pegasys pre-filled syringe from the fridge. Leave the syringe out of the
fridge for 30 minutes before use; or gently warm the syringe in the palms of your
hands for about 1 minute. Be careful not to shake the medication.
2. Preparing the syringe and needle
Remove the protective cap from the end of the needle
Remove the rubber cap from the end of the syringe
Place the needle firmly on the end of the syringe
If you notice any air bubbles in the syringe, hold the syringe with the needle facing
upwards, lightly tap the syringe to bring the air bubbles to the top. You may need
to gently push the plunger in slightly to push air out of the syringe
Check the dose of medication your doctor has prescribed. You may need to gently push
the plunger to push out some medication to get to the dose your doctor has prescribed
If you need to put the syringe (with the needle attached) down, make sure the plastic
guard covers the needle and place on a clean flat surface
The syringe is now ready for use.
3. Choosing the injection site
Choose an injection site in your stomach area or the top of your thigh
Avoid your navel and waistline
Change injection sites each time to prevent soreness in one spot
Never inject into a red or swollen area
Never inject Pegasys into a vein or muscle.
4. Preparing the injection site
Clean the injection site with an alcohol swab and let the skin dry (10 seconds)
Remove the protective needle guard from the end of the syringe and hold the syringe
with the needle facing upwards
Grab your skin at the injection site firmly between your thumb and forefinger to elevate
5. Injecting the medication
Hold the syringe at a 45 degree angle to your skin
Insert the needle in one quick motion with the bevel (flat edge) facing upwards
Slowly push the plunger all the way down
Once all the liquid has left the syringe, pull out the needle at the same angle at
which you put it in
Do not recap the needle
If you notice slight bleeding gently press over the injection site with some cotton
6. Cleaning up after your injection
Place the syringe and needle (as one) into the sharps container immediately after
When the sharps container is full, take it to your clinic for correct disposal
Never throw used needles and syringes in with your household rubbish
Never re-use the syringe or needle. The needle and syringe are to be used once only.
Remember: Most people can learn to give themselves a subcutaneous injection, but if
you experience difficulty, please do not be afraid to ask for help and advice from
your doctor, nurse or pharmacist.
Please note that the needle supplied with the Pegasys pre-filled syringe is for subcutaneous
only and is not suitable for any other type of injection (e.g. intramuscular injection).
When to inject Pegasys
Your doctor will tell you how often to use this medicine. Pegasys is usually given
as a single injection once a week.
If you are injecting this medicine yourself, use it at bedtime, as Pegasys may cause
unusual tiredness or flu-like symptoms.
If you are working, you should inject Pegasys at the beginning of your weekend. This
will help to reduce the impact of side effects of Pegasys on your ability to work.
How long to use Pegasys
Continue using Pegasys until your doctor tells you to stop.
Your doctor will determine when your treatment should be stopped.
If you forget to use Pegasys
If you realise you missed your injection within 2 days after the scheduled dose, you
should inject your recommended dose as soon as you remember. Take your next injection
on the following regularly scheduled day.
If you realise you missed your injection 3 to 5 days after your scheduled dose, you
should inject your recommended dose as soon as you remember. Take your next doses
at 5-day intervals until you return to your regularly scheduled day of the week.
If you realise you missed your injection 6 days after the scheduled dose, you should
wait and inject your dose on the next day.
Do not take a double dose to make up for the injection that you missed.
If you are not sure what to do, ask your doctor, nurse or pharmacist.
If you have trouble remembering when to use your medicine, ask your pharmacist for
If you use too much Pegasys (overdose)
Immediately telephone your doctor or Poisons Information Centre (telephone 13 11 26
in Australia or 0800 764 766 [0800 POISON] in New Zealand) for advice or go to Accident
and Emergency at your nearest hospital if you think that you or anyone else may have
used too much Pegasys, even if there are no signs of discomfort or poisoning.
You may need urgent medical attention.
Keep telephone numbers for these places handy.
While you are using Pegasys
Things you must do
Use Pegasys exactly as your doctor has prescribed.
Tell all doctors, dentists and pharmacists who are treating you that you are using
Tell your doctor if you become pregnant while using Pegasys.
Tell your doctor if, for any reason, you have not used Pegasys exactly as prescribed.
Otherwise, your doctor may think that it was not effective and change your treatment
Be sure to keep all of your appointments with your doctor so that your progress can
Things you must not do
Do not stop using Pegasys or change the dose without first checking with your doctor.
Do not let yourself run out of medicine over the weekend or on holidays.
Do not give Pegasys to anyone else even if they have the same condition as you.
Do not use Pegasys to treat other complaints unless your doctor says to.
Do not switch to any other brand of interferon without consulting your doctor because
a change in dose may be required.
Do not take any other medicines whether they require a prescription or not without
first telling your doctor or consulting a pharmacist.
Things to be careful of
Be careful driving or operating machinery until you know how Pegasys affects you.
Pegasys may cause dizziness, drowsiness or light-headedness in some people. If you
drink alcohol, dizziness, drowsiness or light-headedness may be worse.
Tell your doctor or pharmacist as soon as possible if you do not feel well while you
are using Pegasys.
Pegasys helps most people with chronic hepatitis B or C.
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:
flu-like symptoms such as fever, tiredness/fatigue, chills, muscle or joint pain and
headache (these symptoms can usually be relieved by paracetamol)
injection site reaction
nausea (feeling sick)
insomnia (difficulty sleeping)
temporary hair loss (reversible after finishing treatment)
loss of appetite
itchiness or rash
irritability (getting easily upset)
depression (feeling low, feeling bad about yourself or feeling hopeless)
colouring of the tongue
Tell your doctor immediately or go to Accident and Emergency at your nearest hospital
if you notice any of the following:
signs of anaemia, such as tiredness, shortness of breath when exercising, headaches,
dizziness and looking pale
severe chest pain
feeling very depressed or suicidal
thoughts of causing serious harm to others
problems with your eyesight, such as blurred or loss of vision
severe stomach pain
unusual bleeding or bruising
swelling of the face or tongue, hives, skin pain
a red or purple skin rash that spreads
blisters, particularly on your mouth nose, or eyes
fever or chills beginning a few weeks after treatment has started
These are serious side effects. You may need urgent medical attention. Serious side
effects are rare.
This is not a complete list of all possible side effects. Your doctor or pharmacist
has a more complete list. Others may occur in some people and there may be some side
effects not yet known.
Tell your doctor if you notice anything else that is making you feel unwell, even
if it is not on this list.
Ask your doctor or pharmacist if you don't understand anything in this list.
Do not be alarmed by this list of possible side effects.
You may not experience any of them.
After using Pegasys
Always keep this medicine in the carton until it is time to take it.
If you take the pre-filled syringes out of the pack they may not keep well.
Store Pegasys pre-filled syringes in the fridge at 2 to 8°C. Do not freeze.
Do not shake Pegasys.
Shaking can destroy Pegasys so that it will not work.
Protect Pegasys pre-filled syringes from light.
Do not leave it in the car or on windowsills.
Heat and dampness can destroy some medicines.
Keep Pegasys where young children cannot reach it.
The top shelf of the refrigerator is a good place to store this medicine.
Pegasys pre-filled syringes are for single use only.
The pre-filled syringe should be used once only and any remaining contents should
be discarded with the needle.
If your doctor tells you to stop using Pegasys, or the pre-filled syringe has passed
its expiry date, ask your pharmacist what to do with any pre-filled syringes that
are left over.
If you use Pegasys at home, you must throw away the syringes and needles in a sharps
This will help protect you and other people from accidental needle stick injuries.
Being struck by a needle can pass diseases onto other people. Sharps containers are
available from your pharmacist.
Pegasys pre-filled syringes are available in packs of four, in the following strengths:
135 mcg per 0.5 mL solution*
180 mcg per 0.5 mL solution
Not available in New Zealand
What Pegasys pre-filled syringes look like
Pegasys solution for injection is contained in a disposable glass syringe. The solution
is clear and colourless to light yellow.
A stainless steel needle is also supplied with the syringe to allow for subcutaneous
Each pre-filled syringe also contains:
water for injections
Pegasys pre-filled syringes are distributed by:
Roche Products Pty Limited
ABN 70 000 132 865
Level 8, 30-34 Hickson Road
Sydney NSW 2000
Medical enquiries: 1 800 233 950
Distributed in NZ by:
Roche Products (New Zealand) Limited
PO Box 109113
Newmarket, Auckland 1149
Medical enquiries: 0800 276 243
Please check with your pharmacist for the latest Consumer Medicine Information
Australian Registration Numbers:
180 mcg/0.5 mL AUST R 91837
135 mcg/0.5 mL AUST R 91836
This leaflet was prepared on 11 May 2021