Malathion belongs to a class of medications called organophosphate pediculicides. It disrupts the central nervous systems of parasites, causing muscle paralysis and death. It also prevents the hatching of parasitic nits (eggs). It is used in the treatment of head lice infestations.
Malathion is available as a lotion that can be used on the skin. For the treatment of head lice infestation, apply a sufficient amount of lotion to dry hair and scalp, and allow it to dry naturally, then shampoo and rinse after 8-12 hours. This may be repeated after 7-9 days if lice are still present.
Common side effects of Malathion include dry hair, skin and scalp irritation, and skin reactions.
Common dosing schedule:
Malathion is applied once weekly.
This schedule is for reference only, adjustments may be made according to individual needs.
Some common medications Malathion may interact with:
In Hong Kong, Malathion is an over-the-counter medicine and can be purchased without a prescription from any retail outlet in Hong Kong. This includes grocery stores, convenience stores, medicine shops, and pharmacies. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.
For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at https://www.drugoffice.gov.hk
Need more information?
For detailed information about the use of Malathion in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.
Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.
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