ClinicalTrials.gg
CompletedNCT00858481Updated Oct 20, 2015

A Pilot Dose Ranging Study of Spinosad Creme Rinse

A Phase 2 interventional study of Spinosad Creme Rinse - Vehicle Control and Spinosad Creme Rinse in Pediculosis Capitis and Head Lice, sponsored by ParaPRO LLC. Completed at 1 site in United States. Open to participants aged 2 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2015-10-20.

Sponsored by ParaPRO LLC · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
36
Allocation
Randomized
Ages
2 Years and older
Sex
All
01

Study summary

A pilot dose ranging study to evaluate the safety and efficacy of different strengths of Spinosad Creme versus a vehicle control.

Read the detailed description

A Phase 2a, randomized, single investigational site, investigator/evaluator-blind, four-arm, parallel-group, vehicle-controlled, pilot study to evaluate the safety and efficacy of different strengths of Spinosad Creme rinse verses vehicle control.

02

Conditions studied

  • Pediculosis Capitis
  • Head Lice

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Keywords

  • Pediculosis capitis
  • 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 36 is below 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
2 Years 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

  • Active head lice infestation
  • Male or female, 2 years of age or older
  • Good general health
  • Appropriately signed
  • Subject agreement to not use any other form of lice treatment during the course of the study
  • Subject agreement to not cut or chemically treat their hair between visits

Exclusion criteria

Exclusion Criteria:

  • History of irritation or sensitivity to pediculicides or hair care products
  • Individuals with any visible skin/scalp condition that would interfere with the evaluation
  • Individuals previously treated with a pediculicide within 4 weeks prior to study enrollment
  • Individuals using hair dyes, bleaches, permanent waves or relaxing solutions 2 weeks prior to study enrollment
  • Individuals who have participated in any clinical trial within 30 days of enrollment
  • Individuals with family members who were infested with lice but were unwilling or unable to enroll in the study or use a standard course of lice treatment
  • Females who were pregnant or nursing
  • Sexually active females not using effective
Terms in these criteria, in plain language(2)

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.

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 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Outcomes assessor)
Enrollment
36 participants (actual)

Study arms

  • Placebo comparator
    1

    Vehicle control

    Drug: Spinosad Creme Rinse - Vehicle Control

  • Active comparator
    2

    0.5% Spinosad creme rinse

    Drug: Spinosad Creme Rinse

  • Active comparator
    3

    1.0% Spinosad Creme Rinse

    Drug: Spinosad Creme Rinse

  • Active comparator
    4

    2.0% Spinosad Creme Rinse

    Drug: Spinosad Creme Rinse

Interventions

  • DrugSpinosad Creme Rinse - Vehicle Control

    One or two, 10-minute topical applications (7 days apart)

  • DrugSpinosad Creme Rinse

    0.5% Spinosad Creme Rinse: one or two, 10-minute topical applications (7 days apart)

  • DrugSpinosad Creme Rinse

    1.0% Spinosad Creme Rinse: one or two, 10-minute topical applications (7 days apart)

  • DrugSpinosad Creme Rinse

    2.0% Spinosad Creme Rinse - one or two, 10-minute topical applications (7 days apart)

06

What researchers measure

Primary outcomes

  1. Efficacy of various doses of Spinosad, based on the presence or absence of live lice at 7 and 14 days post-treatment. The efficacy evaluation was performed by a trained evaluator.

    Time frame: 14 days

Secondary outcomes

  1. Safety of various doses of Spinosad, based on the occurrence of adverse events, especially scalp irritation.

    Time frame: 14 days

07

Study locations

1 site
  • Hill Top Research
    West Palm Beach, Florida 33409, United States
08

Timeline

Tracking since Sep 25, 2026
Not marked actual or estimatedDates not marked actual or estimated

The record gives a start of Sep 2005, a primary completion of Nov 2005 and a completion of Nov 2005. It does not say whether these dates are actual or estimated.

How these figures are worked out, and which studies are left out of them.

Registered
Mar 5, 2009
First posted
Mar 9, 2009
Start
Sep 2005
Primary completionActual
Nov 2005
CompletionActual
Nov 2005
Last update
Oct 20, 2015
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Oct 20, 2015, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT00858481
Lead sponsor
ParaPRO LLC
First posted
Mar 9, 2009
Start date
Sep 2005
Primary completion
Nov 2005
Completion
Nov 2005
Last update
Oct 20, 2015

Study contacts

Dyal Garg, Ph.D.
principal investigator · Hill Top Research

Oversight

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

Not currently enrolling

This study is completed, as verified in Oct 2015. You cannot join it, but the record below documents what was studied.

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