A Safety and Pharmacokinetics Study of IDP-118 Lotion in Pediatric Participants With Plaque Psoriasis

Study Overview
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Brief Summary
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This study is to evaluate the safety, the systemic exposure, and the hypothalamic-pituitary-adrenal (HPA) axis suppression potential for topically applied IDP-118 lotion in pediatric participants with moderate to severe plaque psoriasis.

Official Title
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A Phase 4, Open-Label, Multicenter Study Evaluating the Absorption and Systemic Pharmacokinetics and HPA Axis Suppression Potential of Topically Applied IDP-118 Lotion in Pediatric Subjects With Moderate to Severe Plaque Psoriasis

Conditions
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Psoriasis

Intervention / Treatment
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* Drug: IDP-118 Lotion


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Is 4 to 16 years 11 months of age at time of informed consent/assent obtained. Verbal and written informed consent/assent obtained from the participant and/or parent or legal guardian. Has a clinical diagnosis of psoriasis at Screening and Baseline with an Investigator's Global Assessment (IGA) score of 3 or 4. The face, scalp, axillae, and intertriginous areas are to be excluded in this assessment, if psoriasis is present. Has an area of plaque psoriasis appropriate for topical treatment that involves a BSA of at least 10% at Screening and Baseline. The face, scalp, axillae, and intertriginous areas are to be excluded in this calculation. Is willing and able to avoid prolonged exposure of the treatment area to ultraviolet radiation (natural and artificial) for the duration of the study. Is in good general adrenal health, as determined by a 30-minute postcosyntropin stimulation serum cortisol level that is >18 μg/dL at the Screening visit. Females of childbearing potential and females who are pre-menses (9 years and older) must be willing to practice effective contraception for the duration of the study. Exclusion Criteria: Has a history of adrenal disease. Presents with any concurrent skin condition that could interfere with the evaluation of the treatment areas, as determined by the Investigator. Is pregnant, nursing an infant, or planning a pregnancy during the study period. Has received treatment with any investigational drug or device within 60 days or 5 drug half-lives (whichever is longer) prior to baseline or is concurrently participating in another clinical study with an investigational drug or device. Received treatment with a topical antipsoriatic drug product other than corticosteroids within 14 days prior to the Baseline visit and/or treatment containing corticosteroids within 28 days prior to the screening HPA axis stimulation test. Has a history of hypersensitivity or allergic reaction to any of the study drug constituents. Is considered by the Investigator, for any other reason, to be an unsuitable candidate for the study.

Ages Eligible for Study
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Minimum Age: 4 Years
Maximum Age: 17 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: IDP-118 Lotion<br>Two cohorts of pediatric participants (1 cohort of participants age 12 to 16 years 11 months and 1 cohort of participants age 4 to 11 years 11 months) will apply IDP-118 Lotion to Investigator identified lesions affecting a minimum of 10% body surface area (BSA) once daily for 8 weeks. | Drug: IDP-118 Lotion<br>* Topical<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Pharmacokinetics: : Maximum Observed Drug (Halobetasol Propionate, Tazarotene, or Tazarotenic Acid) Concentration in Plasma (Cmax) of IDP-118 Lotion Analytes | On Days 28-29, blood samples will be collected from each participant for the determination of plasma concentrations and PK parameters of IDP-118 lotion analytes. | 0 (predose), 1, 2, 4, 8, 12, and 24 hours postdose | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Proportion of Participants With Hypothalamic-Pituitary-Adrenal (HPA) Axis Suppression at Week 8 | An HPA axis suppression is defined as a 30 minute poststimulation cortisol level of ≤18 micrograms/deciliter (μg/dL) at the end of the study. | Week 8 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Plaque psoriasis