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CompletedNCT00545753Updated 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 Pediculosis, 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
558
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 (human 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

  • Pediculosis

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Keywords

  • Human Head lice
03

In context

Lice Infestations

43 studies on the registry are indexed under Lice Infestations; 4 are open to participants now.

This study's enrollment of 558 is above the median of 105 across 42 interventional studies indexed under Lice Infestations.

Browse Lice Infestations studies →

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
Triple (Care provider, Investigator, Outcomes assessor)
Enrollment
558 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 to Over the Counter (OTC) Instructions for Use

    Drug: Permethrin 1%

Interventions

  • 10 minute topical application product, following 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 25 September 2007; the last follow-up visit occurred on 22 April 2008.

Participant flow — Overall Study
MilestoneA - NatrOVA 1% - No Nit Combing RequiredB - NatrOVA 1% - Nit Combing RequiredC - NIX Applied Per Over the Counter (OTC) Instructions
Started24359256
Completed22754230
Not completed16526
Withdrew: Withdrawal by subject0110
Withdrew: Lost to follow-up13312
Withdrew: Protocol violation314

Outcome measures

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 Combing RequiredB - NatrOVA 1% - Nit Combing RequiredC - NIX Applied Per Over the Counter (OTC) Instructions
Success (no live lice present)771940 (32.7% to 57.5%)
Failure (live lice present)14449
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 Applied Per Over the Counter (OTC) Instructions
Ear and labyrinth disorders - Ear pain01
Eye disorders - Eye irritation03
Eye disorders - pruritus01
Eye disorders - Lacrimination increased01
Eye disorders - Occular hyperaemia1215
Gastrointestinal disorders - Diarrhea10
Gastrointestinal disorders - Stomach discomfort10
Gastrointestinal disorders - Vomiting10
Administration site conditions - discoloration01
Administration site conditions - Dryness10
Administration site conditions - Erythema1517
Administration site conditions - Irritation56
Administration site conditions - Scab01
General Disorder - Pyrexia11
Infections and infestations - Cellulitis01
Infections and infestations - Influenza10
Infections and infestations - Nasopharyngitis12
Infections and infestations - Otitis media10
Infections - Pharyngitis streptococal01
Infections - Upper respiratory tract infection03
Injury - Skin laceration10
Nervous system disorders - Headache11
Nervous system disorders - Syncope01
Respiratory -Chronic obstructive pulmonary disease01
Respiratory - Cough11
Respiratory disorders - pharyngolaryngeal pain10
Skin disorders - Alopecia10
Skin disorders - Dry skin11
Skin disorders - Erythema14

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—0/294 (0%)34/294 (11.6%)
C - NIX Applied Per Over the Counter (OTC) Instructions—2/246 (0.8%)49/246 (19.9%)
Most frequent serious events
Most frequent serious events
EventA/B - NatrOVA 1% - With/Without Nit CombingC - NIX Applied Per Over the Counter (OTC) Instructions
Application Site ErythemaGeneral disorders0/2941/246
CellulitisInfections and infestations0/2941/246
Most frequent other events
Most frequent other events
EventA/B - NatrOVA 1% - With/Without Nit CombingC - NIX Applied Per Over the Counter (OTC) Instructions
Application site erythemaGeneral disorders15/29416/246
Occular hyperaemiaEye disorders12/29415/246
Application site irritationGeneral disorders5/2946/246
ErythemaSkin and subcutaneous tissue disorders1/2944/246
Eye irritationEye disorders0/2943/246
Upper respiratory tract infectionInfections and infestations0/2943/246
NasopharyngitisInfections and infestations1/2942/246

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)A - NatrOVA 1% - No Nit Combing RequiredB - NatrOVA 1% - Nit Combing RequiredC - NIX Applied Per Over the Counter (OTC) InstructionsTotal
<=18 years17240177389
Between 18 and 65 years701978167
>=65 years1012
Age Continuous
Age Continuous(years)A - NatrOVA 1% - No Nit Combing RequiredB - NatrOVA 1% - Nit Combing RequiredC - NIX Applied Per Over the Counter (OTC) InstructionsTotal
Mean16 ± 1519 ± 1617 ± 1417 ± 15
Sex: Female, Male
Sex: Female, Male(Participants)A - NatrOVA 1% - No Nit Combing RequiredB - NatrOVA 1% - Nit Combing RequiredC - NIX Applied Per Over the Counter (OTC) InstructionsTotal
Female20047210457
Male431246101
Region of Enrollment
Region of Enrollment(participants)A - NatrOVA 1% - No Nit Combing RequiredB - NatrOVA 1% - Nit Combing RequiredC - NIX Applied Per Over the Counter (OTC) InstructionsTotal
United States24359256558
08

Study locations

6 sites
  • Hill Top Research
    Scottsdale, Arizona 85251, United States
  • Burke Pharmaceutical Research
    Hot Springs, Arkansas 71913, United States
  • Impact Clinical Trials
    Beverly Hills, California 90211, United States
  • DMI Healthcare Group
    Largo, Florida 33773, United States
  • Hill Top Research
    Miamiville, Ohio 45147, United States
  • Haber Dermatology & Cosmetic Surgery
    South Euclid, Ohio 44118, 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
NCT00545753
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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