ClinicalTrials.gg
CompletedNCT00545168Updated Oct 11, 2012Results posted

Safety and Efficacy Study of NatrOVA Creme Rinse - 1% and NIX Creme Rinse in Subjects 6 Months or Older With Head Lice

A Phase 3 interventional study of Spinosad and Spinosad in Pediculus Capitis Infestation, sponsored by ParaPRO LLC. Completed at 6 sites in United States. Open to participants aged 6 Months and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2012-10-11.

Sponsored by ParaPRO LLC · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
480
Allocation
Randomized
Ages
6 Months and older
Sex
All
01

Study summary

A comparative safety and efficacy study of NatrOVA Creme Rinse - 1% versus NIX Creme Rinse, under actual use conditions in subjects 6 months of age or greater who are infested with Pediculosis capitis (Head lice).

Read the detailed description

This is a Phase 3 multi-site, randomized, evaluator/investigator-blinded, three-arm, parallel group study evaluating the safety and efficacy of NatrOVA Creme Rinse - 1% (with nit combing and without nit combing) versus NIX Creme Rinse in an "actual use" environment.

02

Conditions studied

  • Pediculus Capitis Infestation

Keywords

  • head lice
03

In context

Lead sponsor

ParaPRO LLC is the lead sponsor of 11 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
6 Months and older
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Subjects must have an active head lice infestation present at Day 0.
  2. Subjects can be female or male, at least 6 months of age.
  3. Subjects must be in good general health based on medical history.
  4. Each subject must have an appropriately signed agreement. Subjects under the age of 12 must also provide written or oral assent.
  5. The subject/caregiver must be able to read English or Spanish at a 7th grade level.
  6. The parent or guardian within a household must be willing to allow other household members to be screened for head lice. If other household members are found to have a head lice infestation, they should also be enrolled in the study.
  7. Subjects must agree to not use any other form of lice treatment during the course of the study and must agree not to use any of the excluded concomitant medications.
  8. Subjects must agree not to cut or chemically treat their hair in the period between the initial treatment and the final visit.
  9. Subjects/caregiver must demonstrate a clear understanding of his/her requirements for study participation and agree to comply with study instructions.

Exclusion criteria

Exclusion Criteria:

  1. Individuals with history of irritation or sensitivity to pediculicides or hair care products.
  2. Individuals with any visible skin/scalp condition at the treatment site which, in the opinion of the investigative personnel or Sponsor, will interfere with the evaluation.
  3. Individuals who require treatment with topical salicylic acid, topical , anthralin, vitamin D analogs, retinoids, , topical hair growth formulations, and topical dandruff treatments.
  4. Infested subjects who have been previously treated with a pediculicide within the 48 hours prior to the study.
  5. Individuals with a condition or illness that, in the opinion of the Investigator, may compromise the objective of the protocol.
  6. Individuals receiving systemic or topical drugs or medications, including systemic antibiotics, which in the opinion of the investigative personnel or study monitor may interfere with the study results.
  7. Individuals who have participated in a clinical trial within the past 30 days.
  8. Individuals (or individuals from households) who, in the opinion of the Investigator, do not understand the requirements for study participation and/or may be likely to exhibit poor compliance.
  9. Individuals with household members who are infested with lice but are unwilling or unable to enroll in the study or to use the standard course of lice treatment.
  10. Females who are pregnant or nursing. Females of must have a negative urine pregnancy test prior to treatment at Day 0. If a household has a pregnant female with an active case of head lice, the entire household is excluded from participation. If the pregnant household member does not have lice, this individual must NOT be the caregiver (one who provides treatment to other household members).
  11. Sexually active females not using effective .
  12. Individuals who have a history of drug abuse in the past year.
Terms in these criteria, in plain language(5)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Investigator, Outcomes assessor)
Enrollment
480 participants (actual)

Study arms

  • Experimental
    A - NatrOVA 1% - no nit combing

    NatrOVA Creme Rinse (spinosad) 1% - no nit combing required

    Drug: Spinosad

  • Experimental
    B - NatrOVA 1% - nit combing required

    NatrOVA Creme Rinse (spinosad) 1% - nit combing regimen required

    Drug: Spinosad

  • Active comparator
    C - NIX

    Nix Creme Rinse (permethrin 1%) applied according to OTC Instructions for Use

    Drug: Permethrin 1%

Interventions

  • 10 minute topical application of product, followed by a complete rinse off.

    Also known as: Natroba (spinosad) Topical Suspension, 0.9%

  • 10 minute topical application followed by a complete rinse off, followed by a nit combing regimen.

    Also known as: Natroba (spinosad) Topical Suspension, 0.9%

  • Topical application for 10 minutes, followed by a complete rinse off, followed by a nit combing regimen

    Also known as: NIX Creme Rinse

06

What researchers measure

Primary outcomes

  1. Efficacy of NatrOVA Creme Rinse - 1% Relative to NIX Creme Rinse in Subjects Infested With Head Lice

    The primary efficacy endpoint was the proportion of primary subjects in the enrolled households who were lice free (no live lice, adults or nymphs), as assessed by the trained evaluator, 14 days after the last treatment (i.e., Day 14 for subjects who treated once and Day 21 for subjects who treated twice).

    Time frame: Assessment were made 14 days following the final product treatment

Secondary outcomes

  1. Evaluation of the Safety of NatrOVA Creme Rinse - 1% Based Upon Reported Adverse Events and Observed Skin/Scalp Reactions.

    To evaluate the safety of NatrOVA® 1% Creme Rinse based upon reported adverse events and observed skin/scalp reactions. Additional safety assessments included cutaneous/ocular irritation.

    Time frame: Participants were followed for a minimum of 14 days (1 treatment) and a maximum of 21 days (2 treatments)

07

Results

Posted Oct 11, 2012

Participant flow

The first subject signed an informed consent and enrolled into the study on 21 September 2007; the last follow up visit occurred on 8 April 2008.

Participant flow — Overall Study
MilestoneA - NatrOVA 1% - no Nit CombingB - NatrOVA 1% - Nit Combing RequiredC - NIX
Started20363214
Completed18758193
Not completed16521
Withdrew: Lost to follow-up555
Withdrew: Withdrawal by subject9013
Withdrew: Protocol violation101
Withdrew: Visit for day 21 was not done in error102

Outcome measures

SecondaryEvaluation of the Safety of NatrOVA Creme Rinse - 1% Based Upon Reported Adverse Events and Observed Skin/Scalp Reactions.

To evaluate the safety of NatrOVA® 1% Creme Rinse based upon reported adverse events and observed skin/scalp reactions. Additional safety assessments included cutaneous/ocular irritation.

Time frame:
Participants were followed for a minimum of 14 days (1 treatment) and a maximum of 21 days (2 treatments)
Reported as:
Number · Incidents
Evaluation of the Safety of NatrOVA Creme Rinse - 1% Based Upon Reported Adverse Events and Observed Skin/Scalp Reactions.
IncidentsA/B - NatrOVA 1% - With/Without Nit CombingC - NIX
Ear and labyrinth disorders - Ear pain10
Eye disorders - Eye irritation01
Gastrointestinal disorders - Diarrhea02
Gastroesophageal reflux disease10
Gastrointestinal disorders - Nausea01
Administration site conditions - Erythema214
Administration site conditions - Exfoliation10
Administration site conditions - Irritation01
Infections and infestations - Ear infection01
Infections and infestations -Gastroenteritis viral01
Infections and infestations - Nasopharyngitis10
Infections - Upper respiratory tract infection11
Musculoskeletal disorder - Fibromyalgia01
Nervous system disorders - Dizziness10
Pregnancy01
Respiratory -Chronic obstructive pulmonary disease01
PrimaryEfficacy of NatrOVA Creme Rinse - 1% Relative to NIX Creme Rinse in Subjects Infested With Head Lice

The primary efficacy endpoint was the proportion of primary subjects in the enrolled households who were lice free (no live lice, adults or nymphs), as assessed by the trained evaluator, 14 days after the last treatment (i.e., Day 14 for subjects who treated once and Day 21 for subjects who treated twice).

Time frame:
Assessment were made 14 days following the final product treatment
Reported as:
Number · participants
Efficacy of NatrOVA Creme Rinse - 1% Relative to NIX Creme Rinse in Subjects Infested With Head Lice
participantsA - NatrOVA 1% - no Nit CombingB - NatrOVA 1% - Nit Combing RequiredC - NIX
Success (no live lice present)721736
Failure (live lice present)11448

Adverse events

Collected over Through out the study (7 months).. Non-serious events are listed at a 1% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
A/B - NatrOVA 1% - With/Without Nit Combing—0/258 (0%)2/258 (0.8%)
C - NIX—1/211 (0.5%)16/211 (7.6%)
Most frequent serious events
Most frequent serious events
EventA/B - NatrOVA 1% - With/Without Nit CombingC - NIX
Gastrointestinal ViralGastrointestinal disorders0/2581/211
Most frequent other events
Most frequent other events
EventA/B - NatrOVA 1% - With/Without Nit CombingC - NIX
Application site erythemaGeneral disorders2/25814/211
DiarrheaGastrointestinal disorders0/2582/211

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)A - NatrOVA 1% - no Nit CombingB - NatrOVA 1% - Nit Combing RequiredC - NIXTotal
<=18 years14746147340
Between 18 and 65 years561764137
>=65 years0033
Age Continuous
Age Continuous(years)A - NatrOVA 1% - no Nit CombingB - NatrOVA 1% - Nit Combing RequiredC - NIXTotal
Mean15 ± 1414 ± 1316 ± 1516 ± 14
Sex: Female, Male
Sex: Female, Male(Participants)A - NatrOVA 1% - no Nit CombingB - NatrOVA 1% - Nit Combing RequiredC - NIXTotal
Female16648185399
Male37152981
Region of Enrollment
Region of Enrollment(participants)A - NatrOVA 1% - no Nit CombingB - NatrOVA 1% - Nit Combing RequiredC - NIXTotal
United States20363214480
08

Study locations

6 sites
  • Advanced Dermatology and Cosmetic Surgery
    Ormond Beach, Florida 32174, United States
  • Lice Solutions Network, Inc.
    West Palm Beach, Florida 33407, United States
  • Concentrics Center for Research
    Indianapolis, Indiana 46240, United States
  • Alegent Health Clinic
    Council Bluffs, Iowa 51503, United States
  • Celia Reyes-Acuna
    Corpus Christi, Texas 78411, United States
  • Wee Care Pediatrics
    Layton, Utah 84041, United States
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 11, 2012, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT00545168
Lead sponsor
ParaPRO LLC
Responsible party
Sponsor
First posted
Oct 17, 2007
Start date
Sep 2007
Primary completion
Mar 2008
Completion
May 2008
Results posted
Oct 11, 2012
Last update
Oct 11, 2012

Study contacts

Bill Miller, MD
study director · Concentrics Research

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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Studies of the drug tested here: Spinosad

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