Nix
Nix is an over-the-counter topical medication containing 1% permethrin. It is used to treat head lice infestations by acting as a neurotoxin that paralyzes and kills the lice and their eggs.
Dosage by Body Weight
Wash hair with a conditioner-free shampoo, rinse, and towel dry. Apply Nix to thoroughly saturate the hair and scalp (usually 1/2 to 1 bottle), especially behind the ears and at the back of the neck. Leave on for 10 minutes, then rinse thoroughly with warm water. Use a fine-tooth nit comb to remove dead lice and eggs. A second treatment may be required after 7 to 10 days if live lice are detected.
- Body Weight
- Below 5 kg
- Dose
- Not recommended
- Frequency
- Do not use
- Tracking Notes
- Safety and efficacy in infants under 2 months of age (typically below 5 kg) have not been established.
- Body Weight
- 5-7 kg
- Dose
- Sufficient quantity to saturate hair and scalp
- Frequency
- Single topical application
- Tracking Notes
- For infants 2 months and older. Apply topically once, leave on for 10 minutes, and rinse. May repeat in 7-10 days if live lice are seen.
- Body Weight
- 8-10 kg
- Dose
- Sufficient quantity to saturate hair and scalp
- Frequency
- Single topical application
- Tracking Notes
- Apply topically once, leave on for 10 minutes, and rinse. May repeat in 7-10 days if live lice are seen.
- Body Weight
- 11-15 kg
- Dose
- Sufficient quantity to saturate hair and scalp
- Frequency
- Single topical application
- Tracking Notes
- Apply topically once, leave on for 10 minutes, and rinse. May repeat in 7-10 days if live lice are seen.
- Body Weight
- 16-20 kg
- Dose
- Sufficient quantity to saturate hair and scalp
- Frequency
- Single topical application
- Tracking Notes
- Apply topically once, leave on for 10 minutes, and rinse. May repeat in 7-10 days if live lice are seen.
| Body Weight | Dose | Frequency | Tracking Notes |
|---|---|---|---|
| Below 5 kg | Not recommended | Do not use | Safety and efficacy in infants under 2 months of age (typically below 5 kg) have not been established. |
| 5-7 kg | Sufficient quantity to saturate hair and scalp | Single topical application | For infants 2 months and older. Apply topically once, leave on for 10 minutes, and rinse. May repeat in 7-10 days if live lice are seen. |
| 8-10 kg | Sufficient quantity to saturate hair and scalp | Single topical application | Apply topically once, leave on for 10 minutes, and rinse. May repeat in 7-10 days if live lice are seen. |
| 11-15 kg | Sufficient quantity to saturate hair and scalp | Single topical application | Apply topically once, leave on for 10 minutes, and rinse. May repeat in 7-10 days if live lice are seen. |
| 16-20 kg | Sufficient quantity to saturate hair and scalp | Single topical application | Apply topically once, leave on for 10 minutes, and rinse. May repeat in 7-10 days if live lice are seen. |
Formulation
Purpose
Treatment of head lice (Pediculus humanus capitis) and their eggs (nits).
Generic Name
PermethrinScheduled Drug
No. This medicine is generally not treated as a scheduled/prescription-only drug in common consumer references, but local rules may vary.