Efficacy and Safety of IDP-121 and IDP-121 Vehicle Lotion in the Treatment of Acne Vulgaris

Study Overview
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Brief Summary
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The objective of this study was to evaluate the efficacy, safety, and tolerability of a once daily topical application of IDP-121 Lotion compared with its vehicle (IDP-121 Vehicle Lotion) in participants with moderate to severe acne vulgaris (acne) (that is, acne having an Evaluator's Global Severity Score [EGSS] of 3 [moderate] or 4 [severe]).

Official Title
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A Phase 3, Multi-Center, Randomized, Double-Blind, Vehicle- Controlled, 2-Arm, Parallel Group Comparison Study Comparing the Efficacy and Safety of IDP-121 and IDP-121 Vehicle Lotion in the Treatment of Acne Vulgaris

Conditions
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Acne

Intervention / Treatment
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* Drug: IDP-121 Lotion
* Drug: IDP-121 Vehicle Lotion


Participation Criteria
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Eligibility Criteria
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Key Inclusion Criteria: Male or female at least 9 years of age and older. Written and verbal informed consent must be obtained. Participants less than age of consent must sign an assent for the study and a parent or a legal guardian must sign the informed consent (if participant reaches age of consent during the study they should be re-consented at the next study visit). Participant must have a score of 3 (moderate) or 4 (severe) on the EGSS assessment at the screening and baseline visit Key Exclusion Criteria: Use of an investigational drug or device within 30 days of enrollment or participation in a research study concurrent with this study. Any dermatological conditions on the face that could interfere with clinical evaluations such as acne conglobata, acne fulminans, secondary acne, perioral dermatitis, clinically significant rosacea, gram-negative folliculitis. Any underlying disease(s) or some other dermatological condition of the face that requires the use of interfering topical or systemic therapy or makes evaluations and lesion count inconclusive. Participants with a facial beard or mustache that could interfere with the study assessments.

Ages Eligible for Study
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Minimum Age: 9 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
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: IDP-121 Lotion<br>IDP-121 lotion (tretinoin 0.05 percent [%]) will be applied topically to the face of participants with moderate to severe acne, once daily for 12 weeks. | Drug: IDP-121 Lotion<br>* IDP-121 lotion will be applied as per the instructions provided by the investigational center staff.<br>|
| Placebo Comparator: IDP-121 Vehicle Lotion<br>IDP-121 lotion vehicle will be applied topically to the face of participants with moderate to severe acne, once daily for 12 weeks. | Drug: IDP-121 Vehicle Lotion<br>* IDP-121 vehicle lotion will be applied as per the instructions provided by the investigational center staff.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Absolute Change From Baseline in Mean Noninflammatory Lesion Count to Week 12 | Noninflammatory lesions were defined as follows: Open comedones (blackhead) - plugged hair follicle with dilated/open orifice, black in color; and Closed comedones (whitehead) - plugged hair follicle: small opening at skin surface. For noninflammatory facial lesions, open and closed comedones were recorded as a single count. | Baseline (Day 0), Week 12 | 
| Absolute Change From Baseline in Mean Inflammatory Lesion Count to Week 12 | Inflammatory lesions were defined as follows: Papule - a solid, elevated lesion less than 5 millimeters (mm); and Pustule - an elevated lesion containing pus less than 5 mm. For inflammatory facial lesions, papules and pustules were recorded as a single count, while nodular lesions were counted and recorded separately. | Baseline, Week 12 | 
| Percentage of Participants With Treatment Success at Week 12 | Treatment success was defined as at least a 2-grade reduction from Baseline in EGSS score and an EGSS score equating to Clear or Almost Clear. EGSS was based on a 5-point scale ranging from 0 to 4; where 0 = clear, 1 = almost clear, 2 = mild, 3 = moderate, and 4 = severe. | Baseline, Week 12 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Percent Change From Baseline in Noninflammatory Lesion Count to Week 12 | Noninflammatory lesions were defined as follows: Open comedones (blackhead) - plugged hair follicle with dilated/open orifice, black in color; and Closed comedones (whitehead) - plugged hair follicle: small opening at skin surface. For noninflammatory facial lesions, open and closed comedones were recorded as a single count. | Baseline, Week 12 | 
| Percent Change From Baseline in Inflammatory Lesion Count to Week 12 | Inflammatory lesions were defined as follows: Papule - a solid, elevated lesion less than 5 millimeters (mm); and Pustule - an elevated lesion containing pus less than 5 mm. For inflammatory facial lesions, papules and pustules were recorded as a single count, while nodular lesions were counted and recorded separately. | Baseline, Week 12 |