Extension Study to Evaluate Safety and Efficacy of CTP-543 in Adults With Alopecia Areata

Last updated: October 20, 2025
Sponsor: Sun Pharmaceutical Industries, Inc.
Overall Status: Active - Not Recruiting

Phase

2/3

Condition

Hair Loss

Alopecia

Treatment

CTP-543

Clinical Study ID

NCT03898479
CP543.5001
  • Ages 18-65
  • All Genders

Study Summary

The overall objectives of the study are to evaluate long-term safety of CTP-543 and to assess long-term effects of CTP-543 on treating hair loss in adult patients with chronic, moderate to severe alopecia areata.

Eligibility Criteria

Inclusion

Inclusion Criteria:

  • Have completed 24 weeks of treatment in a previous qualifying CTP-543 clinical trial

Exclusion

Exclusion Criteria:

  • Active scalp inflammation, psoriasis, or seborrheic dermatitis requiring topicaltreatment to the scalp, significant trauma to the scalp, or untreated actinickeratosis

  • Females who are nursing, pregnant, or planning to become pregnant while in thestudy, and for 30 days after last dose of study medication

  • Donation of blood at any point throughout the study and for 30 days after last doseof study medication

Study Design

Total Participants: 1000
Treatment Group(s): 1
Primary Treatment: CTP-543
Phase: 2/3
Study Start date:
April 04, 2019
Estimated Completion Date:
June 30, 2027

Connect with a study center

  • Dermatology Research Institute

    Calgary, Alberta T1Y 0B4
    Canada

    Site Not Available

  • Kirk Barber Research

    Calgary, Alberta T2G 1B1
    Canada

    Site Not Available

  • Care Clinic

    Red Deer, Alberta T4P 1K4
    Canada

    Site Not Available

  • Dermatology Research Institute

    Calgary 5913490, Alberta 5883102 T1Y 0B4
    Canada

    Site Not Available

  • Kirk Barber Research

    Calgary 5913490, Alberta 5883102 T2G 1B1
    Canada

    Site Not Available

  • Care Clinic

    Red Deer 6118158, Alberta 5883102 T4P 1K4
    Canada

    Site Not Available

  • Medical Arts Health Research Group

    Kelowna, British Columbia V1Y 4N7
    Canada

    Site Not Available

  • Enverus Medical Research

    Surrey, British Columbia V3V 0C6
    Canada

    Site Not Available

  • Medical Arts Health Research Group

    Kelowna 5990579, British Columbia 5909050 V1Y 4N7
    Canada

    Site Not Available

  • Enverus Medical Research

    Surrey 6159905, British Columbia 5909050 V3V 0C6
    Canada

    Site Not Available

  • Wiseman Dermatology Research Inc.

    Winnipeg, Manitoba R3M 3Z4
    Canada

    Site Not Available

  • Wiseman Dermatology Research Inc.

    Winnipeg 6183235, Manitoba 6065171 R3M 3Z4
    Canada

    Site Not Available

  • SimcoDerm Medical and Surgical Dermatology Center

    Barrie, Ontario L4M 7G1
    Canada

    Site Not Available

  • Kingsway Clinical Research

    Etobicoke, Ontario M8X 1Y9
    Canada

    Site Not Available

  • Guelph Dermatology Research

    Guelph, Ontario N1L 0B7
    Canada

    Site Not Available

  • DermEffects

    London, Ontario N6H 5L5
    Canada

    Site Not Available

  • Lynderm Research Inc.

    Markham, Ontario L3P 1X3
    Canada

    Site Not Available

  • Dr. S. K. Siddha Medicine Professional Corporation

    Newmarket, Ontario L3Y 5G8
    Canada

    Site Not Available

  • The Centre for Clinical Trials

    Oakville, Ontario L6J 7W5
    Canada

    Site Not Available

  • JRB research Inc.

    Ottawa, Ontario K1K 4L2
    Canada

    Site Not Available

  • Centre for Dermatology

    Richmond Hill, Ontario L4B 1A5
    Canada

    Site Not Available

  • Research Toronto

    Toronto, Ontario M4W 2N4
    Canada

    Site Not Available

  • Alliance Clinical Trials

    Waterloo, Ontario N2J 1C4
    Canada

    Site Not Available

  • K. Papp Clinical Research

    Waterloo, Ontario N2J 1C4
    Canada

    Site Not Available

  • SimcoDerm Medical and Surgical Dermatology Center

    Barrie 5894171, Ontario 6093943 L4M 7G1
    Canada

    Site Not Available

  • Kingsway Clinical Research

    Etobicoke 5950268, Ontario 6093943 M8X 1Y9
    Canada

    Site Not Available

  • Guelph Dermatology Research

    Guelph 5967629, Ontario 6093943 N1L 0B7
    Canada

    Site Not Available

  • DermEffects

    London 6058560, Ontario 6093943 N6H 5L5
    Canada

    Site Not Available

  • Lynderm Research Inc.

    Markham 6066513, Ontario 6093943 L3P 1X3
    Canada

    Site Not Available

  • Dr. S. K. Siddha Medicine Professional Corporation

    Newmarket 6087701, Ontario 6093943 L3Y 5G8
    Canada

    Site Not Available

  • The Centre for Clinical Trials

    Oakville 6092122, Ontario 6093943 L6J 7W5
    Canada

    Site Not Available

  • JRB research Inc.

    Ottawa 6094817, Ontario 6093943 K1K 4L2
    Canada

    Site Not Available

  • Centre for Dermatology

    Richmond Hill 6122091, Ontario 6093943 L4B 1A5
    Canada

    Site Not Available

  • Research Toronto

    Toronto 6167865, Ontario 6093943 M4W 2N4
    Canada

    Site Not Available

  • Alliance Clinical Trials

    Waterloo 6176823, Ontario 6093943 N2J 1C4
    Canada

    Site Not Available

  • Innovaderm Research Inc.

    Montreal, Quebec H2X 2V1
    Canada

    Site Not Available

  • Innovaderm Research Inc.

    Montreal 6077243, Quebec 6115047 H2X 2V1
    Canada

    Site Not Available

  • Centre de Recherche Dermatologique du Quebec metropolitain (CRDQ)

    Québec, G1V 4X7
    Canada

    Site Not Available

  • Centre de Recherche Dermatologique du Quebec metropolitain (CRDQ)

    Québec 6325494, G1V 4X7
    Canada

    Site Not Available

  • Total Skin and Beauty Dermatology Center

    Birmingham, Alabama 35203
    United States

    Site Not Available

  • Total Skin and Beauty Dermatology Center

    Birmingham 4049979, Alabama 4829764 35203
    United States

    Site Not Available

  • Alliance Dermatology & MOHS Center

    Phoenix, Arizona 85032
    United States

    Site Not Available

  • Center for Dermatology and Plastic Surgery/CCT Research

    Scottsdale, Arizona 85260
    United States

    Site Not Available

  • Alliance Dermatology & MOHS Center

    Phoenix 5308655, Arizona 5551752 85032
    United States

    Site Not Available

  • Center for Dermatology and Plastic Surgery/CCT Research

    Scottsdale 5313457, Arizona 5551752 85260
    United States

    Site Not Available

  • Johnson Dermatology

    Fort Smith, Arkansas 72916
    United States

    Site Not Available

  • Northwest Arkansas Clinical Trials Center, PLLC

    Rogers, Arkansas 72758
    United States

    Site Not Available

  • Johnson Dermatology

    Fort Smith 4111410, Arkansas 4099753 72916
    United States

    Site Not Available

  • Northwest Arkansas Clinical Trials Center, PLLC

    Rogers 4128894, Arkansas 4099753 72758
    United States

    Site Not Available

  • Kern Research Inc.

    Bakersfield, California 93301
    United States

    Site Not Available

  • Hope Clinical Research

    Canoga Park, California 91303
    United States

    Site Not Available

  • California Dermatology & Clinical Research Institute

    Encinitas, California 92024
    United States

    Site Not Available

  • University of California, Irvine

    Irvine, California 92697
    United States

    Site Not Available

  • Dermatology Research Associates

    Los Angeles, California 90045
    United States

    Site Not Available

  • Quest Dermatology Research

    Northridge, California 91324
    United States

    Site Not Available

  • Kaiser Permanente Northern California - Oakland

    Oakland, California 94611
    United States

    Site Not Available

  • Palmtree Clinical Research, Inc.

    Palm Springs, California 92262
    United States

    Site Not Available

  • Stanford University School of Medicine - Medical Dermatology Clinic

    Redwood City, California 94063
    United States

    Site Not Available

  • Kaiser Permanente South Sacramento

    Sacramento, California 95823
    United States

    Site Not Available

  • Kaiser Permanente Clinical Trials Unit

    San Francisco, California 94118
    United States

    Site Not Available

  • Kern Research Inc.

    Bakersfield 5325738, California 5332921 93301
    United States

    Site Not Available

  • Hope Clinical Research

    Canoga Park 5333913, California 5332921 91303
    United States

    Site Not Available

  • California Dermatology & Clinical Research Institute

    Encinitas 5346646, California 5332921 92024
    United States

    Site Not Available

  • University of California, Irvine

    Irvine 5359777, California 5332921 92697
    United States

    Site Not Available

  • Dermatology Research Associates

    Los Angeles 5368361, California 5332921 90045
    United States

    Site Not Available

  • Quest Dermatology Research

    Northridge 5377985, California 5332921 91324
    United States

    Site Not Available

  • Kaiser Permanente Northern California - Oakland

    Oakland 5378538, California 5332921 94611
    United States

    Site Not Available

  • Palmtree Clinical Research, Inc.

    Palm Springs 5380668, California 5332921 92262
    United States

    Site Not Available

  • Stanford University School of Medicine - Medical Dermatology Clinic

    Redwood City 5386834, California 5332921 94063
    United States

    Site Not Available

  • Kaiser Permanente South Sacramento

    Sacramento 5389489, California 5332921 95823
    United States

    Site Not Available

  • Kaiser Permanente Clinical Trials Unit

    San Francisco 5391959, California 5332921 94118
    United States

    Site Not Available

  • Colorado Center for Dermatology, PLLC d/b/a CODerm Research

    Centennial, Colorado 80111
    United States

    Site Not Available

  • Colorado Medical Research Center

    Denver, Colorado 80210
    United States

    Site Not Available

  • Colorado Center for Dermatology, PLLC d/b/a CODerm Research

    Centennial 5416541, Colorado 5417618 80111
    United States

    Site Not Available

  • Colorado Medical Research Center

    Denver 5419384, Colorado 5417618 80210
    United States

    Site Not Available

  • Yale University Church Street Research Unit

    New Haven, Connecticut 06519
    United States

    Site Not Available

  • Yale University Church Street Research Unit

    New Haven 4839366, Connecticut 4831725 06519
    United States

    Site Not Available

  • Skin Care Research, LLC

    Boca Raton, Florida 33486
    United States

    Site Not Available

  • Siperstein Dermatology Group

    Boynton Beach, Florida 33472
    United States

    Site Not Available

  • Skin Care Research, LLC

    Hollywood, Florida 33021
    United States

    Site Not Available

  • Floridian Research Institute, LLC

    Miami, Florida 33179
    United States

    Site Not Available

  • University of Miami Hospital

    Miami, Florida 33125
    United States

    Site Not Available

  • Lenus Research & Medical Group, LLC

    Sweetwater, Florida 33172
    United States

    Site Not Available

  • Clinical Research Trials of Florida, Inc.

    Tampa, Florida 33607
    United States

    Site Not Available

  • ForCare Clinical Research

    Tampa, Florida 33613
    United States

    Site Not Available

  • Skin Care Research, LLC

    Boca Raton 4148411, Florida 4155751 33486
    United States

    Site Not Available

  • Skin Care Research, LLC

    Hollywood 4158928, Florida 4155751 33021
    United States

    Site Not Available

  • Floridian Research Institute, LLC

    Miami 4164138, Florida 4155751 33179
    United States

    Site Not Available

  • University of Miami Hospital

    Miami 4164138, Florida 4155751 33125
    United States

    Site Not Available

  • Lenus Research & Medical Group, LLC

    Sweetwater 4174600, Florida 4155751 33172
    United States

    Site Not Available

  • Clinical Research Trials of Florida, Inc.

    Tampa 4174757, Florida 4155751 33607
    United States

    Site Not Available

  • ForCare Clinical Research

    Tampa 4174757, Florida 4155751 33613
    United States

    Site Not Available

  • ASR, LLC

    Boise, Idaho 83702
    United States

    Site Not Available

  • ASR, LLC

    Nampa, Idaho 83687
    United States

    Site Not Available

  • ASR, LLC

    Boise 5586437, Idaho 5596512 83702
    United States

    Site Not Available

  • Denova Research

    Chicago, Illinois 60611
    United States

    Site Not Available

  • Denova Research

    Chicago 4887398, Illinois 4896861 60611
    United States

    Site Not Available

  • Dawes Fretzin Clinical Research Group, LLC

    Indianapolis, Indiana 46250
    United States

    Site Not Available

  • DS Research

    New Albany, Indiana 47150
    United States

    Site Not Available

  • The Indiana Clinical Trials Center, PC

    Plainfield, Indiana 46168
    United States

    Site Not Available

  • Dawes Fretzin Clinical Research Group, LLC

    Indianapolis 4259418, Indiana 4921868 46250
    United States

    Site Not Available

  • DS Research

    New Albany 4262045, Indiana 4921868 47150
    United States

    Site Not Available

  • The Indiana Clinical Trials Center, PC

    Plainfield 4263108, Indiana 4921868 46168
    United States

    Site Not Available

  • DS Research

    Louisville, Kentucky 40241
    United States

    Site Not Available

  • Qualmedica Research

    Owensboro, Kentucky 42301
    United States

    Site Not Available

  • DS Research

    Louisville 4299276, Kentucky 6254925 40241
    United States

    Site Not Available

  • Qualmedica Research

    Owensboro 4303436, Kentucky 6254925 42301
    United States

    Site Not Available

  • Brigham and Women's Hospital

    Boston, Massachusetts 02115
    United States

    Site Not Available

  • Massachusetts General Hospital

    Boston, Massachusetts 02114
    United States

    Site Not Available

  • Brigham and Women's Hospital

    Boston 4930956, Massachusetts 6254926 02115
    United States

    Site Not Available

  • Massachusetts General Hospital

    Boston 4930956, Massachusetts 6254926 02114
    United States

    Site Not Available

  • Clarkston Skin Research

    Clarkston, Michigan 48346
    United States

    Site Not Available

  • Clinical Research Institute of Michigan

    Clinton Township, Michigan 48038
    United States

    Site Not Available

  • Clarkston Skin Research

    Clarkston 4988997, Michigan 5001836 48346
    United States

    Site Not Available

  • Clinical Research Institute of Michigan

    Clinton Township 4989133, Michigan 5001836 48038
    United States

    Site Not Available

  • Minnesota Clinical Study Center

    Fridley, Minnesota 55432
    United States

    Site Not Available

  • University of Minnesota Department of Dermatology

    Minneapolis, Minnesota 55417
    United States

    Site Not Available

  • Minnesota Clinical Study Center

    Fridley 5027482, Minnesota 5037779 55432
    United States

    Site Not Available

  • University of Minnesota Department of Dermatology

    Minneapolis 5037649, Minnesota 5037779 55417
    United States

    Site Not Available

  • Vivida Dermatology

    Las Vegas, Nevada 89119
    United States

    Site Not Available

  • Vivida Dermatology

    Las Vegas 5506956, Nevada 5509151 89119
    United States

    Site Not Available

  • ActivMed Practices & Research, Inc.

    Portsmouth, New Hampshire 03801
    United States

    Site Not Available

  • Skin Laser and Surgery Specialists of NJ

    Hackensack, New Jersey 07601
    United States

    Site Not Available

  • Schweiger Dermatology, P.C.

    Verona, New Jersey 07044
    United States

    Site Not Available

  • The Dermatology Group, P.C.

    Verona, New Jersey 07044
    United States

    Site Not Available

  • Skin Laser and Surgery Specialists of NJ

    Hackensack 5098706, New Jersey 5101760 07601
    United States

    Site Not Available

  • Schweiger Dermatology, P.C.

    Verona 5105809, New Jersey 5101760 07044
    United States

    Site Not Available

  • Icahn School of Medicine at Mount Sinai

    New York, New York 10029
    United States

    Site Not Available

  • Sadick Research Group

    New York, New York 10075
    United States

    Site Not Available

  • UR Dermatology at College Town

    Rochester, New York 14620
    United States

    Site Not Available

  • Icahn School of Medicine at Mount Sinai

    New York 5128581, New York 5128638 10029
    United States

    Site Not Available

  • Sadick Research Group

    New York 5128581, New York 5128638 10075
    United States

    Site Not Available

  • UR Dermatology at College Town

    Rochester 5134086, New York 5128638 14620
    United States

    Site Not Available

  • Darst Dermatology

    Charlotte, North Carolina 28277
    United States

    Site Not Available

  • Dermatology Specialists of Charlotte

    Charlotte, North Carolina 28211
    United States

    Site Not Available

  • North Carolina Dermatology Associates, PLLC

    Raleigh, North Carolina 27617
    United States

    Site Not Available

  • Wake Forest University Health Sciences, Department of Dermatology

    Winston-Salem, North Carolina 27104
    United States

    Site Not Available

  • Darst Dermatology

    Charlotte 4460243, North Carolina 4482348 28277
    United States

    Site Not Available

  • Dermatology Specialists of Charlotte

    Charlotte 4460243, North Carolina 4482348 28211
    United States

    Site Not Available

  • North Carolina Dermatology Associates, PLLC

    Raleigh 4487042, North Carolina 4482348 27617
    United States

    Site Not Available

  • Wake Forest University Health Sciences, Department of Dermatology

    Winston-Salem 4499612, North Carolina 4482348 27104
    United States

    Site Not Available

  • Bexley Dermatology Research

    Bexley, Ohio 43209
    United States

    Site Not Available

  • Remington-Davis, Inc.

    Columbus, Ohio 43215
    United States

    Site Not Available

  • Bexley Dermatology Research

    Bexley 4506487, Ohio 5165418 43209
    United States

    Site Not Available

  • Remington-Davis, Inc.

    Columbus 4509177, Ohio 5165418 43215
    United States

    Site Not Available

  • Vital Prospects Clinical Research Institute, P.C.

    Tulsa, Oklahoma 74136
    United States

    Site Not Available

  • Vital Prospects Clinical Research Institute, P.C.

    Tulsa 4553433, Oklahoma 4544379 74136
    United States

    Site Not Available

  • NW Dermatology Institute

    Portland, Oregon 97210
    United States

    Site Not Available

  • Oregon Medical Research Center

    Portland, Oregon 97201
    United States

    Site Not Available

  • NW Dermatology Institute

    Portland 5746545, Oregon 5744337 97210
    United States

    Site Not Available

  • Oregon Medical Research Center

    Portland 5746545, Oregon 5744337 97201
    United States

    Site Not Available

  • Hospital of the University of Pennsylvania Dept of Dermatology

    Philadelphia, Pennsylvania 19104
    United States

    Site Not Available

  • Dermatology Associates of Plymouth Meeting

    Plymouth Meeting, Pennsylvania 19462
    United States

    Site Not Available

  • Peak Research - Pennsylvania

    Upper Saint Clair, Pennsylvania 15241
    United States

    Site Not Available

  • Hospital of the University of Pennsylvania Dept of Dermatology

    Philadelphia 4560349, Pennsylvania 6254927 19104
    United States

    Site Not Available

  • Dermatology Associates of Plymouth Meeting

    Plymouth Meeting 5206666, Pennsylvania 6254927 19462
    United States

    Site Not Available

  • Peak Research - Pennsylvania

    Upper Saint Clair 5216895, Pennsylvania 6254927 15241
    United States

    Site Not Available

  • Velocity Clinical Research-Providence

    East Greenwich, Rhode Island 02818
    United States

    Site Not Available

  • Rhode Island Hospital

    Providence, Rhode Island 02903
    United States

    Site Not Available

  • Velocity Clinical Research-Providence

    East Greenwich 5221875, Rhode Island 5224323 02818
    United States

    Site Not Available

  • Rhode Island Hospital

    Providence 5224151, Rhode Island 5224323 02903
    United States

    Site Not Available

  • Clinical Research Center of the Carolinas

    Charleston, South Carolina 29407
    United States

    Site Not Available

  • Palmetto Clinical Trial Services

    Fountain Inn, South Carolina 29644
    United States

    Site Not Available

  • Clinical Research Center of the Carolinas

    Charleston 4574324, South Carolina 4597040 29407
    United States

    Site Not Available

  • Palmetto Clinical Trial Services

    Fountain Inn 4579043, South Carolina 4597040 29644
    United States

    Site Not Available

  • Dermatology Treatment and Research Center - Dallas

    Dallas, Texas 75230
    United States

    Site Not Available

  • North Texas Center for Clinical Research

    Frisco, Texas 75034
    United States

    Site Not Available

  • Suzanne Bruce and Associates, PA

    Houston, Texas 77056
    United States

    Site Not Available

  • Austin Institute for Clinical Research, Inc.

    Pflugerville, Texas 78660
    United States

    Site Not Available

  • Dermatology Clinical Research Center of San Antonio

    San Antonio, Texas 78229
    United States

    Site Not Available

  • Progressive Clinical Research

    San Antonio, Texas 78213
    United States

    Site Not Available

  • Texas Dermatology and Laser Specialists

    San Antonio, Texas 78218
    United States

    Site Not Available

  • Dermatology Treatment and Research Center - Dallas

    Dallas 4684888, Texas 4736286 75230
    United States

    Site Not Available

  • North Texas Center for Clinical Research

    Frisco 4692559, Texas 4736286 75034
    United States

    Site Not Available

  • Suzanne Bruce and Associates, PA

    Houston 4699066, Texas 4736286 77056
    United States

    Site Not Available

  • Austin Institute for Clinical Research, Inc.

    Pflugerville 4718711, Texas 4736286 78660
    United States

    Site Not Available

  • Dermatology Clinical Research Center of San Antonio

    San Antonio 4726206, Texas 4736286 78229
    United States

    Site Not Available

  • Progressive Clinical Research

    San Antonio 4726206, Texas 4736286 78213
    United States

    Site Not Available

  • Texas Dermatology and Laser Specialists

    San Antonio 4726206, Texas 4736286 78218
    United States

    Site Not Available

  • Jordan Valley Dermatology

    West Jordan, Utah 84088
    United States

    Site Not Available

  • Jordan Valley Dermatology

    West Jordan 5784549, Utah 5549030 84088
    United States

    Site Not Available

  • University of Virginia Health System

    Charlottesville, Virginia 22903
    United States

    Site Not Available

  • West End Dermatology Associates

    Richmond, Virginia 23233
    United States

    Site Not Available

  • University of Virginia Health System

    Charlottesville 4752031, Virginia 6254928 22903
    United States

    Site Not Available

  • West End Dermatology Associates

    Richmond 4781708, Virginia 6254928 23233
    United States

    Site Not Available

  • Clinical Investigation Specialists, Inc.

    Kenosha, Wisconsin 53144
    United States

    Site Not Available

  • Clinical Investigation Specialists, Inc.

    Kenosha 5258393, Wisconsin 5279468 53144
    United States

    Site Not Available

Map preview placeholder

Not the study for you?

Let us help you find the best match. Sign up as a volunteer and receive email notifications when clinical trials are posted in the medical category of interest to you.