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Active substance: DIMETICONE

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4% Lotion dimeticone

Patient Information

A topical lotion for the
eradication of head lice.
You can use this medicine to treat
adults and children over 6 months old
without seeing a doctor, but use it
carefully to get the best results.
Read all this leaflet carefully before you
start using this medicine.
• Keep this leaflet. You may need to

read it again.

• Ask your pharmacist for further advice

if live lice are detected after the
second treatment with Hedrin®, or if
head lice are a persistent or recurring

• If you have any other questions, ask

your doctor or pharmacist.

• If you notice any side effects or any

side effects not mentioned in this
leaflet, talk to your doctor or

In this leaflet

What is Hedrin® Lotion and what does it do?
Before using Hedrin®
How to use Hedrin®
Possible side effects
Storing Hedrin®
Further information

1 What is Hedrin® Lotion
and what does it do?
The name of your medicine is Hedrin® 4%
Lotion. It is a cutaneous solution which is
highly effective against head lice.

2 Before using Hedrin®
Do not use Hedrin®:
• If you are allergic to either of the ingredients
Take special care with Hedrin® Lotion:
• For external use only.
• Avoid contact of the lotion with your eyes. If it
accidentally comes into contact with your
eyes, flush with water.
Keep hair away from sources of ignition,
especially naked flames and burning
cigarettes, whilst being treated with
Hedrin®. Treated hair can readily burn if
If you accidentally swallow some
• If you accidentally swallow some of the
solution, you should consult a doctor as
soon as possible. Take the pack with you
to show which medicine you have swallowed.
If you get an allergic reaction
e.g. rash, swelling or weals on the skin, or
breathing difficulties (see section 4), shampoo off
the product straight away and get medical advice
Use in pregnancy and breastfeeding:
Hedrin® Lotion may be used during pregnancy
and breastfeeding.
Use in infants under 6 months:
Children under 6 months should only be treated
under medical supervision.
Driving and using machines:
Hedrin® Lotion does not affect your ability to
drive or operate machinery.

3 How to use Hedrin®
Hedrin® is suitable for adults and children aged
6 months and over.
Please note:
If a member of the family has live head lice,
check the other family members and treat all
other cases of live head lice which are
discovered, at the same time.
Hedrin® is for external use only.

• Apply sufficient lotion evenly over
DRY hair ensuring that the scalp is
fully covered.
• Work into the hair spreading the
liquid evenly from the roots to tips.
Allow the hair to dry naturally.
• Leave on the hair for at least 8 hours
or overnight.
• Wash the hair with normal shampoo,
rinse thoroughly with water and dry.
Duration of treatment
• It is important that Hedrin® Lotion is
applied again after seven days to deal
with any lice which may hatch in that
time. Failure to repeat the treatment may
result in the return of a louse infestation.

4 Possible side effects
Important side effects

If you experience any of the following, stop using
Hedrin® immediately (shampoo off) and talk to a
doctor or pharmacist.
• Allergic reactions such as rash, swelling or
weals on the skin.
• Breathing difficulties
Other side effects
When using Hedrin® on broken skin, slight
irritation may occur. Sometimes application may
cause flaking of the scalp, itching and irritation
around the eyes.
If you notice any of these or other side
effects, stop using the product and talk to a
doctor or pharmacist.

5 Storing Hedrin®
• Keep out of the reach and sight of children.
• This product does not require any other special
storage conditions.
• Do not use after the expiry date shown on the
• Care should be taken if Hedrin® is spilled as it
may cause a slip hazard.

6 Further information
What Hedrin® Lotion contains
The active substance is Dimeticone 4% w/w.
Dimeticone is not a chemical poison. It works by a
physical process which effectively covers and
drowns the louse.
The other ingredients are Cyclomethicone 5.
Cyclomethicone 5 is a carrier ingredient which
evaporates after application leaving the active
ingredient to kill the lice.
What Hedrin® looks like
It is a clear colourless solution.
Hedrin® is available in 50ml and 100ml packs,
although not all packs may be marketed.
Marketing Authorisation Holder and
Thornton & Ross Ltd., Huddersfield, HD7 5QH, UK.
Date of preparation of the package leaflet
This leaflet was prepared in June 2012
Hedrin® is a registered Trade Mark of Thornton
& Ross Ltd.

About head lice

• Head lice vary in size according to their age.
From the size of a printed full stop.... the size of a sesame seed
Head lice can be difficult to spot because they
can match their colour to that of the
• Lice live close to the scalp where they feed on
blood and this can cause the scalp to itch.
• Head lice cannot jump, fly or swim and can
only be acquired by direct head to head
contact. This is why lice are commonly found
on the heads of children and those in close
contact with children and why it is important
to check the heads of all the family members
when head lice are found.
• Head lice only live on humans and have no
preference for clean or dirty hair.
• The female louse will lay between 3 and 5 eggs
per day and these hatch after 7 days. This is why
it is important to repeat this treatment after 7
days to ensure that any lice which have hatched
after the first treatment are killed.
• Once the louse has hatched, the empty case
(known as a nit) will remain glued to the hair
shaft. Nits are completely harmless and can be
removed with the fingers or a fine toothed comb.




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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.