Derbac M Liquid 150ml

SKU : OTCDERM150 PIP-Code : 4151056 EAN : 5000477724190
Derbac M Liquid treats head lice, pubic lice and scabies in adults and children from 6 months.
Out of Stock
£20.85 £0.14 per ml
View delivery information
Questionnaire Icon This medicine can only be sold under the supervision of a Pharmacist, therefore you will need to answer a few short questions so our Pharmacist can ensure this product is suitable for you.
Information Icon This product is limited to 2 per customer

Browse our full range of:


Derbac M Liquid

Derbac M Liquid treats head lice, pubic lice and their eggs and scabies 
in adults, the elderly and children aged 6 months and over. It is free from alcohol making it ideak for people with asthma or eczema.


 For adults, the elderly and children aged 6 months and over:

Treatment of head lice
  • Apply sufficient liquid to dry hair to ensure that no part of the hair is uncovered. Work into the hair, spreading the liquid evenly from the roots to the tips.
  • Leave the hair to dry naturally in a warm but well ventilated room.
  • After 12 hours, or the next day if preferred, shampoo hair in the normal way
  • Rinse the hair and comb whilst wet to remove dead lice and eggs (nits) using a nit comb.
  • Wash hands after application.
  • The treatment should be repeated after 7 days.
Treatment of crab (pubic) lice
  • Apply to the entire skin surface.
  • Pay particular attention to all hairy areas including beards and moustaches. Avoid any other areas above the neck.
  • Leave on for at least one hour before washing but preferably leave on overnight. Wash off in the usual manner.
  • Wash hands after application.
  • The treatment should be repeated after 7 days.
Treatment of scabies
  • Apply to the entire skin surface.
  • In adults it may not be necessary to apply above the neck. If used in children under two years, a thin film of the liquid should be applied to the scalp, face and 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 re-applied immediately.
  • Wash hands after application.
  • The treatment should be repeated after 7 days


  • Active Ingredient: Malathion 0.5% w/w.
  • Other Ingredients: Methyl Hydroxybenzoate (E218), Propyl Hydroxybenzoate (E216), Emulsifying Wax, Potassium Citrate, Citric Acid, Perfume HT 52 and Purified Water.


  • Should a member of your family need treatment, check the other members of your family for live lice with a detector comb and treat simultaneously if necessary.
  • The infestation is cleared by the treatment, however the itching and rash may persist for up to 7 days. An anti-irritant cream can be applied if necessary.
  • Prolonged or repeated use with this product should be avoided. It should not be used more than once a week and not for more than three consecutive weeks.
  • If you are a healthcare professional treating a large number of children, then wear protective plastic or rubber gloves.
  • Derbac M Liquid contains methyl hydroxybenzoate (E218) and propyl hydroxybenzoate (E216) which may cause allergic reactions (possibly delayed).
Do not use Derbac M Liquid:
  • If you are allergic to any of the ingredients in this product.
  • On children under 6 months, unless your doctor tells you to.
  • On damaged or infected skin unless advised by your doctor or pharmacist.
Talk to your doctor or pharmacist before using Debac M Liquid:
  • If you are pregnant or breastfeeding.

Patient Information

Always read the product information. Click on the link below to view the Patient Information Leaflet. Requires Adobe Reader – if you cannot open the file, please
click here to download.

Patient Information Leaflet

Feefo Reviews

Next Working Day Delivery as standard for mainland UK orders
Free delivery on orders over £50.00 to mainland UK
NHS and Private Prescriptions delivered straight to your door