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Completed

NCT Number: NCT00660985

Pharmacokinetic Study to Compare the Systemic Exposure of Differin® Gel, 0.3% or Differin® Gel, 0.1%

Phase 4 commitment pharmacokinetic study to determine systemic exposure to adapalene.

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Key information

Conditions

Acne Vulgaris Acneiform Eruptions Sebaceous Gland Diseases Skin Diseases Skin and Connective Tissue Diseases

Age range

18 year–35 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 4

Primary location

DermResearch, Inc., Austin, Texas, United States

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About this study

Multi-center, double-blind, randomized, parallel group study enrolling male or female subjects with acne vulgaris.

Screening will take place within 14 days prior to Baseline. At the Baseline visit, and at each study day up to Day 30, a trained nurse or technician will apply 2 grams of study medication (either Differin® Gel, 0.3% or Differin® Gel, 0.1%) to the face, upper part of chest, and upper part of back of the subjects. To ensure maximal usage conditions, 2 grams study medication will be applied once daily to a total body surface area of approximately 1000 cm², which is equivalent to 2 mg/cm2.

Subjects will arrive at the clinic the night before on visit days (Day 1, Day 15 and Day 30) when PK blood samples will be drawn. Subjects will be discharged from the clinic on Day 2 and Day 16 following the 24-hour post-dose blood sample, and on Day 31 after the 36-hour post-dose blood samples.

Cutaneous safety (local tolerability assessments) will be assessed, by recording erythema, scaling, dryness, and stinging/burning sensation as separate scores on the face, upper part of the chest, and upper part of the back using a 4-point scale (0 = None to 3 = Severe). Local tolerability assessments will be performed weekly on Day 1, 8, 15, 22 and Day 30, prior application of study medication.

Efficacy will be evaluated by Inflammatory and Non-inflammatory lesion counts on the face performed at Screening, Baseline (Day 1), and on Day 30.

Subjects will have routine laboratory tests (fasting hematology, blood chemistry) performed at Screening and at Day 30 visits.

Blood samples for determination of adapalene plasma concentrations will be drawn on Day 1, Day 15, and Day 30 before the morning study medication application (pre-dose) and 1, 2, 4, 6, 8, 10, 12, 16 and 24 hours after application of study medication; and additionally after the last study medication application (Day 31, 32, 33) at 32, 36, 48 and 72 hours post-dose.

The adapalene plasma concentrations will be determined by a high performance liquid chromatography (HPLC) and fluorescence detection method.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Male or female 18 to 35 years of age
  • Clinical diagnosis of acne vulgaris
  • Minimum of 20 Inflammatory
  • Minimum of 20 Non-inflammatory lesions
  • The subject has a body weight between 45 and 100 kg, and a Body Mass Index (BMI) between 18 and 30Kg/m2

Exclusion criteria

  • More than 1 nodule or any cyst on the face (excluding the nose)
  • Acne conglobata, acne fulminans, secondary acne or severe acne
  • Underlying diseases or other dermatological conditions that require the use of interfering topical or systemic therapy
  • Pregnant or nursing or planning a pregnancy
  • Surgical or medical condition which might interfere with the absorption, distribution, metabolism, or excretion of the drug
  • Known allergies to any of the ingredients of the study medication
  • History of alcohol or drug abuse or positive test results for any drug abuse
  • Positive test results for hepatitis B surface antigen (HBs-Ag), hepatitis C virus (HCV) or human immunodeficiency virus antibodies (HIV Ab)
  • Use of prohibited medications prior to the study unless appropriate washout period is documented

Treatment and study plan

Adapalene

Drug

Gel, 0.3%, 2g, once daily for 30 days

Primary outcomes

  1. Cmax (ng/mL) at Day 1

    Time frame: T0 (predose), T1hour (hr), T2hr, T4hr, T6 hr, T8 hr, T10hr, T12hr, T16hr, T24hr (post dose)

    the observed peak drug (adapalene) concentration

  2. Cmax (ng/mL) at Day 15

    Time frame: T0 (predose), T1hour (hr), T2hr, T4hr, T6 hr, T8 hr, T10hr, T12hr, T16hr, T24hr (post dose)

    the observed peak drug (adapalene) concentration

  3. Cmax (ng/mL) at Day 30

    Time frame: T0 (predose), T1hour (hr), T2hr, T4hr, T6 hr, T8 hr, T10hr, T12hr, T16hr, T24hr, T32hr, T36hr, T48hr, T 72hr (post dose)

    the observed peak drug (adapalene) concentration

  4. Tmax (hr) at Day 1

    Time frame: T0 (predose), T1hour (hr), T2hr, T4hr, T6 hr, T8 hr, T10hr, T12hr, T16hr, T24hr (post dose)

    the time at which Cmax occurs

  5. Tmax (hr) at Day 15

    Time frame: T0 (predose), T1hour (hr), T2hr, T4hr, T6 hr, T8 hr, T10hr, T12hr, T16hr, T24hr (post dose)

    the time at which Cmax occurs

  6. Tmax (hr) at Day 30

    Time frame: T0 (predose), T1hour (hr), T2hr, T4hr, T6 hr, T8 hr, T10hr, T12hr, T16hr, T24hr, T32hr, T36hr, T48hr, T72hr (post dose)

    the time at which Cmax occurs

  7. Area Under the Plasma Concentration Versus Time Curve for 0 to 24 Hours Post Dose Measured on Day 1 (AUC (0-24))

    Time frame: T0 (predose), T1hour (hr), T2hr, T4hr, T6 hr, T8 hr, T10hr, T12hr, T16hr, T24hr (post dose)

    area under the concentration-time curve calculated mixed linear-logarithmic trapezoidal method from pre-application (T0) through 24 hr (corresponding to the dosing interval)

  8. Area Under the Plasma Concentration Versus Time Curve for 0 to 24 Hours Post Dose Measured on Day 15 (AUC (0-24))

    Time frame: T0 (predose), T1hour (hr), T2hr, T4hr, T6 hr, T8 hr, T10hr, T12hr, T16hr, T24hr (post dose)

    area under the concentration-time curve calculated mixed linear-logarithmic trapezoidal method from pre-application (T0) through 24hr (corresponding to the dosing interval)

  9. Area Under the Plasma Concentration Versus Time Curve for 0 to 24 Hours Post Dose Measured on Day 30 (AUC (0-24))

    Time frame: T0 (predose), T1hour (hr), T2hr, T4hr, T6 hr, T8 hr, T10hr, T12hr, T16hr, T24hr, T32hr, T36hr, T48hr, T72hr (post dose)

    area under the concentration-time curve calculated mixed linear-logarithmic trapezoidal method from pre-application (T0) through 24hr (corresponding to the dosing interval)

Sponsors and collaborators

Lead sponsor

Galderma R&D

Industry

Registry information

Official study title

A Pharmacokinetic Study to Compare the Systemic Exposure to Adapalene During Dermal Application of Either Differin® Gel, 0.3% (Adapalene 0.3%) or Differin® Gel, 0.1% (Adapalene 0.1%) for 30 Days in Subjects With Acne Vulgaris

Important dates

Study start
2008
Primary completion
2008
Study completion
2008
First posted
Apr 18, 2008
Registry last updated
Feb 18, 2021

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

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This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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