Active substance: ACICLOVIR

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Please read right through this leaflet before you start using this medicine. This
medicine is available without prescription, but you still need to use Zovirax Cold Sore
Cream carefully to get the best results from it.
Keep this leaflet, you may need to read it again.
If you have any further questions, ask your pharmacist.

In this leaflet:
1. What Zovirax does
2. Check before you use Zovirax
3. How to use Zovirax
4. Possible side effects
5. How to store Zovirax
6. Further information

1. What Zovirax does
Zovirax is used for the treatment of cold sores. The active ingredient is aciclovir, an
antiviral agent. Apply at the first signs of a cold sore (such as tingling and itching). It
can also be used to speed up healing if one has already appeared.

2. Check before you use Zovirax

Take special care with Zovirax
Always wash your hands before and after applying Zovirax.
Do not touch your eyes until you have washed your hands after application.
If you accidentally get cream in your eye, wash out thoroughly with warm
water. Consult your doctor if you are concerned.
Do not swallow the cream. If you accidentally swallow any cream, it is
unlikely to cause any ill effects but consult your doctor if you are concerned.
Avoid touching a cold sore to prevent transferring the infection or making
it worse.
If you have been told by your doctor that you have a weakened immune
system, contact your doctor before treating any type of infection.
If you are in any doubt if you have a cold sore, contact your doctor.
If your cold sore gets very severe, contact your doctor.

Pharma code Ref. No. 4673

Do not use Zovirax:
if you have ever had an allergic reaction to aciclovir, valaciclovir, propylene glycol
or any of the other ingredients (listed in Section 6)
inside your mouth
to treat mouth ulcers
in the eyes or genital area.

Pregnancy and breast feeding
Talk to your doctor or pharmacist before using Zovirax if you are pregnant, trying to
become pregnant or are breast feeding.

3. How to use Zovirax
Suitable for all ages:
Apply at the first signs of a cold sore (such as tingling and itching).
Apply liberally to the affected area 5 times a day.
Continue treatment for 4 days. If your cold sore hasn’t healed after this
time, you can use the cream for up to 10 days in total.
Treat your cold sore for 4 full days to ensure rapid healing.
If you forget a dose, apply when you remember and continue as before.
If your cold sore hasn’t healed fully after 10 days, or if it gets worse at any
time, contact your doctor.
Never give your Zovirax to others, even if their symptoms are the same as yours.
The amount of cream inside this pack is enough for one cold sore attack.
For any future attacks, start treatment at the first signs of a cold sore
developing (such as tingling or itching). It can also be started during the
blister stage.
Do not use more than the recommended dose.
continued over

Front of Leaflet
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Pharma code Ref. No. 4673

4. Possible side effects
Like all medicines, Zovirax can have side effects, but not everybody gets them.
Stop using the medicine and tell your doctor if you experience:
Allergy-like reactions, for example swelling of the lips, face and eyelids.
The following side effects could also occur:
Mild burning or stinging after application. This
will quickly go away.
Redness, itching or a mild drying or flaking of the
skin, skin rashes, hives or weals.
If you do get any side effects, even those not
mentioned in this leaflet, tell your doctor or

5. How to store Zovirax
Keep out of the reach and sight of children.
Do not use this medicine after ‘EXP’ date shown on the pack.
Do not store above 25°C but do not keep it in a refrigerator.

6. Further information
Active ingredient 5% w/w Aciclovir.
Other ingredients Dimeticone, propylene glycol, poloxamer 407, cetostearyl alcohol,
sodium laurilsulfate, white soft paraffin, liquid paraffin, arlacel 165 (glycerol
monostearate, macrogol stearate 100) and purified water.
Propylene glycol may cause skin irritation.
Cetostearyl alcohol can cause local skin reactions (e.g. contact dermatitis).
Zovirax is available in a 2g tube or pump.

More about cold sores
A cold sore is an infection which is caused by the herpes simplex virus (HSV),
which lies dormant in nerve cells supplying your lips and the surrounding skin.

When does the first infection occur?
The first infection usually occurs in early childhood, probably after being
kissed by a person with the infection. The virus passes through the skin,
travels up a nerve and stays in a nerve junction indefinitely.

What can trigger the virus?
Various things, including colds, ‘flu, menstruation, fatigue, emotional upset,
stress, physical injury, bright sunlight and simply when you are feeling ‘run
down’. Once triggered, the virus travels back down the nerve to the skin on
and around the lips where it causes the cold sore to develop.

Remember – cold sores are infectious
The virus is capable of infecting other parts of the body. To reduce the risk
of passing the infection on, do not allow others to touch your cold sore, or
to share your towel, etc. You should avoid kissing and oral sex if you or your
partner has an active cold sore. Always wash your hands before and after
touching cold sores.
Avoid touching your eyes. HSV infection of the eye can lead to ulcers on
the window of the eye (cornea).
Avoid kissing – especially children – when you have a cold sore.
Don’t break the blisters or pick the scabs. Not only could you infect your
cold sore with other germs, you may infect your fingers with the virus.
Don’t share your eating and drinking utensils.
The marketing authorisation holder is GlaxoSmithKline Consumer Healthcare,
Brentford, TW8 9GS, U.K. and all enquiries should be sent to this address.
The manufacturer is Glaxo Wellcome Operations, Harmire Road, Barnard Castle,
Co. Durham, DL12 8DT, UK.
This leaflet was last revised in June 2012.
Zovirax, the Half Clock Device and At Blister Or Tingle are registered trade marks of
the GlaxoSmithKline group of companies.


Back of Leaflet
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Source: Medicines and Healthcare Products Regulatory Agency

Disclaimer: Every effort has been made to ensure that the information provided here is accurate, up-to-date and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. This information has been compiled for use by healthcare practitioners and consumers in the United States. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate that the drug or combination is safe, effective or appropriate for any given patient. If you have questions about the substances you are taking, check with your doctor, nurse or pharmacist.