Derbac Derbac M Malathion Liquid For Lice and Scabies 150ml


New Larger 150ml Bottle!

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Code DERBACM4155

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Product Info

Derbac M Liquid is an effective treatment for head lice, pubic lice (crab lice), their eggs and in the treatment of scabies. The active ingredient in this medicine is Malathion 0.5% w/w.

  • Suitble for sensitive skin and asthma sufferers
  • Can be used from 6 months of age

You Must Be Aged Over 18 Years to Purchase This Product. 

How To Use
Who can use Derbac M?

This product is for use in adults, children 6 months and over.  

How to use Derbac M?

If one member of your family requires treatment it is important to check other members of your family for living lice and treat them also if necessary.

To Treat lice

  • Apply the liquid to dry hear ensuring the scalp is fully covered. Work into the hear spreading the liquid evenly from the root to the tips.
  • Dry hair naturally in a well-ventilated room.
  • The following day or after 12 hours wash your hair in the usual manner.
  • While the hair is still wet use a nit comb to remove dead lice and eggs/nits.
  • This treatment should be repeated after 7 days.

To Treat Scabies

  • Apply to the entire skin surface
  • In adults it may not be necessary to apply above the neck
  • If used in children under the age of 2 years, a thin film of the liquid should be applied to scalp, face and on the ears but not inside the ears, avoiding the eyes and mouth
  • Do not wash off or bathe for 24 hours.If hands or any other parts must be washed during this period, the treatment must be reapplied to those areas immediately
  • The treatment should be repeated after 7 days

For the treatment of Public Lice (crabs) please see the patient information leaflet (PIL) in the box.

If you are pregnant or breastfeeding.

If you are pregnant or breastfeeding please speak to your doctor before using this medication.

Driving and using machines

Using this product is not known to affect your ability to drive or use machinery.

Possible side effects

Like all medicines, Derbac M can cause side effects, although not everybody gets them. If you experience any serious side effects please consult your doctor.



Active Ingredients

Malathion 0.5%

Free Shipping & Delivery Options

Delivery Within Ireland 

  • Free Delivery Over €39.99
  • Orders will be dispatched within 1 working day
  • Shipping for orders under €39.99
    • €4.99 for An Post (order by 3pm for same day dispatch)
    • €5.99 for DPD (order by 1pm for same day dispatch)

European Courier Delivery (DPD) Deliveries to France, Germany, Netherlands, Spain, Italy, Denmark, Poland, Austria, Belgium, Sweden, Portugal & Finland will now use a courier service. This is a faster shipping service than current postal times with shipping now estimated within 5-7 working days.

Other International Deliveries
For more information on international delivery, please read our Delivery Information page.

La Roche Posay & Vichy products are only permitted to be sold within EEA/EFTA countries.

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