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Active substance(s): SALICYLIC ACID

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Thwart® 26%w/w cutaneous solution
salicylic acid
Information for Patients
Read all of this leaflet carefully because it contains important
information for you.
This medicine is available without prescription. However, you still need to use
Thwart carefully to get the best results from it.
• Keep this leaflet. You may need to read it again.
• Ask your pharmacist if you need more information or advice.
• You must contact a doctor, pharmacist or nurse if your symptoms worsen
or do not improve.
• If any of the side effects gets serious, or if you notice any side effect not
listed in this leaflet, please tell your doctor, pharmacist or nurse.
The information in this leaflet has been divided into the following sections:
1. What Thwart is and what it is used for
2. Check before you use Thwart
3. How to use Thwart
4. Possible side effects
5. How to store Thwart
6. Further information

1. What Thwart is and what it is used for
Thwart is used to treat and remove raised warts (usually found on the hands,
elbows or knees) and verrucas (warts on the feet). Thwart is a special
solution which can be easily applied to the wart, dries quickly, needs no
plasters and if used properly should cause minimal irritation.
Warts, or verrucas as they are often called, are found most commonly on the
hands, feet and knees. They are commonest amongst children of school age.
Warts are caused by a virus which gets into the upper layers of the skin. The
body then reacts to the virus, which leads to the formation of the wart or
verruca. Warts are most frequently transmitted by contact, e.g. swimming
pools and communal changing rooms are often associated with infection.
Warts can occur singly or in groups and can be transferred from one part of
the body to another, e.g. from one foot to the other.
Thwart contains a high concentration of salicylic acid which when used
regularly removes the dead cells from the outer layer of the skin and steadily
reduces the size of the wart.

2. Check before you use Thwart

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Do not use Thwart:
• if you are allergic (hypersensitive) to salicylic acid (aspirin) or any of the
other ingredients of Thwart (see section 6 Further information)
• if you have diabetes
• if you have poor blood circulation
• if the wart or skin surrounding it is inflamed or broken
• on moles, birthmarks, unusual warts with hairgrowth
• on your face
• on warts in the anal or genital region.
Take special care with Thwart
Thwart is flammable – keep it away from flames and fire.
Thwart is for external use only and should only be applied to warts.
Do not use on broken or damaged skin such as cuts or grazes.
Try not to get Thwart on the normal skin around the wart. You should apply
Thwart to the centre of the wart therefore avoiding the surrounding healthy
Do not allow Thwart to come into contact with mucous membranes (e.g. your
mouth, nose and other body openings) or your eyes.
If Thwart gets into any of these areas, flush immediately with water for 15
Using other medicines
When used according to the instructions, Thwart is not known to interfere with
any other medicines. However, you should not use any other treatments on
your warts or verrucas at the same time as using Thwart.
Pregnancy and breast-feeding
The safe use of Thwart during pregnancy and breast-feeding has not been
established. Therefore Thwart should be used with caution or following advice
of your doctor.
Ask your doctor or pharmacist for advice before taking any medicine.

3. How to use Thwart
Apply Thwart once daily as follows:

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Before you apply Thwart,
soak affected areas in warm
water for 5 minutes.

Gently remove any loose
tissue from the wart surface by
rubbing with a brush, emery
board, pumice or abrasive
sponge. Be careful not to
damage the surrounding
healthy skin.

Dry the affected area
thoroughly using a towel.
The towel should not be
used by anyone else
otherwise the wart could
be passed to them.

Use the applicator brush
supplied in the cap to apply
Thwart to the wart. Do
not get any on the surrounding
healthy skin. Allow Thwart to
dry completely and then apply
a second coat. You do not need
to cover the wart with a plaster
or bandage.

You should notice an improvement within 1-2 weeks but for maximum effect,
continue treatment for 4-6 weeks.
Do not allow the solution to drip onto the neck of the bottle or you may find it
difficult to open the bottle next time.
What to do if you use more Thwart than you should
If you accidentally swallow Thwart, use too much of it or use it for long periods
of time, the body could absorb too much salicylic acid. This could cause
ringing in the ears, feeling or being sick. If this occurs, or you notice any other
symptoms, stop using Thwart and consult your doctor.
If you forget to use Thwart
If you forget to use Thwart on any occasion, do not worry, just continue to use
daily as before.
If you have any further questions on the use of this product, ask your doctor,
nurse or pharmacist.

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4. Possible side effects
Do not worry. Like all medicines, Thwart can cause side effects, although not
everyone gets them.
If any of the following symptoms occur you should stop using Thwart and
contact your doctor or pharmacist:
• ringing in the ears
• feeling or being sick.
Other side effects include:
• redness, rash or itching affecting the normal skin around the wart. If this
occurs, stop using Thwart for a few days until the irritation goes away.
When you re-start treatment, be careful to apply the solution only to the
wart itself.
If Thwart causes a lot of skin irritation, stop using it and contact your doctor or
Reporting of side effects
If you get any side effects, talk to your doctor, nurse or pharmacist. This
includes any possible side effects not listed in this leaflet. You can also report
side effects directly via:
The Yellow Card Scheme:
HPRA Pharmacovigilance, Earlsfort Terrace, IRL - Dublin 2;
Tel: +353 1 6764971; Fax: +353 1 6762517. Website:, E-mail:
By reporting side effects you can help provide more information on the safety
of this medicine.

5. How to store Thwart
Thwart is flammable - keep away from fire or flame.

Keep out of the reach and sight of children.
Do not use Thwart after the expiry date which is stated on the carton and
bottle. The expiry date refers to the last day of that month after EXP.
Do not store Thwart above 25ºC. Keep bottle tightly closed when not in use
and avoid dripping the solution on to the thread of the bottle-neck which can
make opening difficult.

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Medicines should not be disposed of via wastewater or household waste. Ask
your pharmacist on how to dispose of medicines no longer required. These
measures will help protect the environment.

6. Further information
What is in Thwart?
The active ingredient in this medicine is salicylic acid 26% w/w.
The other ingredients are polyvinyl butyral, dibutyl phthalate, isopropyl
alcohol, butyl acetate and acrylates copolymer.
What Thwart looks like and contents of the pack
Thwart is a colourless to pale yellow solution.
Thwart is available in amber, glass bottles containing 10 millilitres, with an
applicator brush in the cap.
Marketing Authorisation Holder and Manufacturer
The Marketing Authorisation Holder is: Alliance Pharmaceuticals Ltd,
Avonbridge House, Chippenham, Wiltshire, SN15 2BB, UK.
Manufactured by Pharmasol Ltd, North Way, Andover, Hants, SP10 5AZ, UK
and Biotec (Suffolk) Ltd, Great Yarmouth, Norfolk, NR30 3DN, UK.
The information in this leaflet applies only to Thwart. If you have any
questions or you are not sure about anything, ask your doctor or a
This leaflet was last approved: 5th December 2014
Thwart is a registered trademark of Alliance Pharmaceuticals Limited.
Alliance and associated devices are registered trademarks of Alliance
Pharmaceuticals Limited.
© Alliance Pharmaceuticals Ltd 2014

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.