The purpose of the study was to evaluate ovicidal efficacy of a single application of abametapir lotion 0.74% w/w intended for the treatment of head lice.

This was a double-blind, randomised, vehicle-controlled, parallel group study in males and females, aged three years and older with active head lice infestation. The study was designed to assess the ovicidal efficacy of a single application of abametapir lotion 0.74% w/w compared to a vehicle control, when applied to the scalp and hair for 10 minutes at the study site. This study used an ex vivo method of assessment for ovicidal efficacy.

Inclusion Criteria:

1. Healthy male or female based on medical history
2. Six months of age or older.
3. Has an active head lice infestation with a minimum of 3 live head lice and at least 10 undamaged and unhatched head lice eggs in their hair.
4. Agrees to an examination for head lice and compliance with the study procedures.
5. All adult subjects must sign a written voluntary informed consent. For minors, the parent/ legal guardian agrees to the subject participating in the study as determined by the signing of an assent of informed consent.

Exclusion Criteria:

1. Has scalp disease or a history of allergies or prior reactions to any head lice products.
2. Has a condition that, in the opinion of the Investigator, may interfere with the study.
3. Is receiving systemic or topical medication, which in the opinion of the Investigator, may compromise the integrity of the safety and/or efficacy assessments.
4. Had treatment (over-the-counter (OTC) or home remedy medication) for head lice within 14 days prior to Day 0.
5. Has received an investigational agent within 30 days prior to Day 0.

All Randomized Population included subjects who were randomized into the study.

AEs were collected from the start of treatment on Day 0 through the Day 7 follow up visit (Approximately 8 days).