for people ages 18-65 (full criteria)
at Irvine, California and other locations
study started
estimated completion



This is a two part, double-blind, randomized, multicenter study to evaluate the regrowth of hair with CTP-543 and subsequent durability of that regrowth following dose reduction in adult patients with moderate to severe alopecia areata.

Official Title

A Study to Evaluate Maintenance of Hair Regrowth Following Dose Reduction of CTP-543 in Adult Patients With Moderate to Severe Alopecia Areata


Alopecia Areata, CTP-543, Alopecia


You can join if…

Open to people ages 18-65

  • Definitive diagnosis of alopecia areata with a current episode of scalp hair loss lasting at least 6 months and not exceeding 10 years at the time of Screening. Total disease duration greater than 10 years is permitted.
  • At least 50% scalp hair loss, as defined by a SALT score ≥50, at Screening and Baseline.
  • Willing to comply with the study visits and requirements of the study protocol.

You CAN'T join if...

  • Treatment with other medications or agents within 1 month of Baseline or during the study that may affect hair regrowth or immune response.
  • Active scalp inflammation, psoriasis, or seborrheic dermatitis requiring topical treatment to the scalp, significant trauma to the scalp, or other scalp condition that may interfere with the SALT assessment, or untreated actinic keratosis anywhere on the body at Screening and/or Baseline.
  • Treatment with systemic immunosuppressive medications within 3 months of Screening or during the study, or biologics within 6 months of Screening or during the study.
  • Females who are nursing, pregnant, or planning to become pregnant while in the study, and for 30 days after last dose of study drug.
  • Clinically significant medical condition, psychiatric disease, or social condition, as determined by the Investigator, that may unfavorably alter the risk-benefit of study participation, adversely affect study compliance, or confound interpretation of study results.


  • University of California, Irvine
    Irvine California 92697 United States
  • California Dermatology & Clinical Research Institute
    Encinitas California 92024 United States


in progress, not accepting new patients
Start Date
Completion Date
Concert Pharmaceuticals
Phase 2 Alopecia Research Study
Study Type
Expecting 300 study participants
Last Updated