Malathion
Malathion is an organophosphate pediculicide and miticide. It is used topically to eradicate head lice and their eggs, and in some formulations, to treat scabies. It works by irreversibly inhibiting acetylcholinesterase in the parasites, causing neuromuscular paralysis and death.
Dosage by Body Weight
For topical dermatological use only. Apply to dry hair/scalp until thoroughly wet. Let hair dry naturally (do not use heat or hair dryers as the product is highly flammable). Leave on for 8 to 12 hours, then wash thoroughly with regular shampoo and use a nit comb. A second application may be required 7 to 9 days later if live lice are detected.
- Body Weight
- Below 5 kg
- Dose
- Not recommended
- Frequency
- N/A
- Tracking Notes
- Contraindicated. Safety and efficacy have not been established in infants.
- Body Weight
- 5-7 kg
- Dose
- Not recommended
- Frequency
- N/A
- Tracking Notes
- Contraindicated. Safety and efficacy have not been established in infants.
- Body Weight
- 8-10 kg
- Dose
- Not recommended
- Frequency
- N/A
- Tracking Notes
- Safety and efficacy have not been established in young children under 6 years of age.
- Body Weight
- 11-15 kg
- Dose
- Not recommended
- Frequency
- N/A
- Tracking Notes
- Typically not approved for children under 6 years of age. Consult a pediatrician.
- Body Weight
- 16-20 kg
- Dose
- Not recommended
- Frequency
- N/A
- Tracking Notes
- Approved primarily for pediatric patients aged 6 years and older. Use only under direct medical supervision.
| Body Weight | Dose | Frequency | Tracking Notes |
|---|---|---|---|
| Below 5 kg | Not recommended | N/A | Contraindicated. Safety and efficacy have not been established in infants. |
| 5-7 kg | Not recommended | N/A | Contraindicated. Safety and efficacy have not been established in infants. |
| 8-10 kg | Not recommended | N/A | Safety and efficacy have not been established in young children under 6 years of age. |
| 11-15 kg | Not recommended | N/A | Typically not approved for children under 6 years of age. Consult a pediatrician. |
| 16-20 kg | Not recommended | N/A | Approved primarily for pediatric patients aged 6 years and older. Use only under direct medical supervision. |
Formulation
Purpose
Treatment of head lice (Pediculus humanus capitis) and their eggs (nits), as well as scabies infestations.
Generic Name
MalathionBranded Drug Names
Malathion is listed as a generic drug name. Common branded medicines that may contain the same active ingredient include:
Scheduled Drug
Yes. This medicine should be supplied or used only according to applicable prescription and regulatory requirements.