Where are peptides being studied? Explore registered human studies by product, phase, condition and location — from early development through Phase 4, alongside studies where phase does not apply.
Searchable results come from ClinicalTrials.gov and include international sites. For broader coverage, use the worldwide and regional registries below. No single registry captures every study.
Enter a peptide, product, condition or location. Try generic names, brand names and development codes separately. Results are registry search matches, not automatically verified links to a WPF peptide record.
Search terms are sent to ClinicalTrials.gov and appear in the page URL. Do not enter personal or medical identifying information. Registry records are served with up to a one-hour cache; registry updates themselves can lag real-world changes.
Registry search results
Matching records; showing 7 on this page, newest registry updates first. Search checked 2026-11-08 17:54 UTC. Counts are registry matches, not unique peptides or a worldwide total.
Start: 2004-12. Completion: 2009-07 (may be estimated). No results posted in this registry response.
Products and interventions (4)
Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.
Thymosin alpha 1 (biological) — also listed as: Zadaxin
Ribavirin (drug) — also listed as: Copegus
PEGinterferon alfa2a (biological) — also listed as: Pegasys
Placebo (drug)
Where the study takes place — 9 listed sites
Site status can differ from overall study status. This list includes all reported sites, even when your search specifies one location. Confirm availability and eligibility with the study team through the original record.
Explore the world’s study registries
These links open external registries; their records are not merged into the results above. WHO ICTRP provides a broader search across contributing registries. Search the same generic name, aliases and development codes in relevant regions. One multinational study may appear in more than one registry, so compare registration identifiers before counting it twice.
Hôpital Necker Paris, France Site recruitment: Not reported
Universitätsklinikum Tübingen Tübingen, Germany Site recruitment: Not reported
University Hospital of Ioannina Ioannina, Greece Site recruitment: Not reported
Ospedale Casa Sollievo della Sofferenza San Giovanni Rotondo, Foggia, Italy Site recruitment: Not reported
Policlinico S.Orsola-Malpighi Bologna, Italy Site recruitment: Not reported
Ospedale Cardarelli Naples, Italy Site recruitment: Not reported
Università Cattolica del Sacro Cuore Rome, Italy Site recruitment: Not reported
Dipartimento Medico Chirurgico delle Malattie dell'Apparato Digerente e della Nutrizione, Azienda Ospedaliera S Giovanni Battista Turin, Italy Site recruitment: Not reported
Hospital del Mar Barcelona, Spain Site recruitment: Not reported
Site status can differ from overall study status. This list includes all reported sites, even when your search specifies one location. Confirm availability and eligibility with the study team through the original record.
CHU de Grenoble Hopital Albert Michallon Service de Dermatologie La Tronche, France Site recruitment: Not reported
CHU de Limoges Hopital Dupuytren Service de Dermatologie Limoges, France Site recruitment: Not reported
Hopital Saint-Eloi Service de Dermatologie Montpellier, France Site recruitment: Not reported
Centre Eugene Marquis Departement d'Oncologie Medicale Rennes, France Site recruitment: Not reported
Hopital Purpan Service de Dermatologie Toulouse, France Site recruitment: Not reported
Klinik fur Dermatologie und Allergologie der RWTH Aachen Aachen, Germany Site recruitment: Not reported
Klinik fur Dermatologie, Venerologie und Allergologie des Campus Charitè Mitte Berlin, Germany Site recruitment: Not reported
Elbeklinikec Buxtehude Dermatologische Zentrum Abteilung fur Dermato-Onkologie Buxtehude, Germany Site recruitment: Not reported
Zentrum fur Dermatologie und Veneralogie Klinik der Johann-Wolfgang-Goethe-Universitat Frankfurt, Germany Site recruitment: Not reported
Klinikum Hannover, Hautklinik Linden Hanover, Germany Site recruitment: Not reported
Universitatsklinikum Schlewig-Holstein Klinik fur Dermatologie, Veneralogie und Allergologie Universitats-Hautklinik Kiel Kiel, Germany Site recruitment: Not reported
Universitatsklinik fur Dermatologie und Venerologie Otto-von-Guericke-Universitat Magdeburg Magdeburg, Germany Site recruitment: Not reported
Dermatologische Klinik der Universitat Tubingen Tübingen, Germany Site recruitment: Not reported
Orszagos Bor-es Nemikortani Intezet Budapest, Hungary Site recruitment: Not reported
National Institute of Allergy and Infectious Diseases (NIAID)
Countries with listed sites
United States
Registry dates and results
Start: Not reported. Completion: Not reported (may be estimated). No results posted in this registry response.
Products and interventions (3)
Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.
Thymalfasin (drug)
Interleukin-2, Polyethylene Glycolated (drug)
Zidovudine (drug)
Where the study takes place — 1 listed sites
Site status can differ from overall study status. This list includes all reported sites, even when your search specifies one location. Confirm availability and eligibility with the study team through the original record.
Stanford Univ Med Ctr Stanford, California, United States Site recruitment: Not reported
Start: 2002-05. Completion: Not reported (may be estimated). No results posted in this registry response.
Products and interventions (2)
Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.
thymalfasin (thymosin alpha 1) (drug)
PEGinterferon alfa-2a (drug)
Where the study takes place — 56 listed sites
Site status can differ from overall study status. This list includes all reported sites, even when your search specifies one location. Confirm availability and eligibility with the study team through the original record.
University of Alabama - Knollwood Physician's Group Mobile, Alabama, United States Site recruitment: Not reported
Mayo Clinic Scottsdale, Arizona, United States Site recruitment: Not reported
Advanced Clinical Research Institute Anaheim, California, United States Site recruitment: Not reported
Gastroenterology Associates of East Bay Medical Group Berkeley, California, United States Site recruitment: Not reported
Scripps Clinic La Jolla, California, United States Site recruitment: Not reported
Loma Linda University Medical Center Loma Linda, California, United States Site recruitment: Not reported
Huntington Memorial Hospital Pasadena, California, United States Site recruitment: Not reported
Kaiser Permanente Sacramento, California, United States Site recruitment: Not reported
University of California, Davis Medical Center Sacramento, California, United States Site recruitment: Not reported
California Pacific Medical Center San Francisco, California, United States Site recruitment: Not reported
San Mateo Medical Center San Mateo, California, United States Site recruitment: Not reported
Kaiser Permanente Santa Clara, California, United States Site recruitment: Not reported
Arapahoe Gastroenterology Littleton, Colorado, United States Site recruitment: Not reported
Walter Reed Army Medical Center Washington D.C., District of Columbia, United States Site recruitment: Not reported
Washington Hospital Center Washington D.C., District of Columbia, United States Site recruitment: Not reported
University of Florida Gainesville, Florida, United States Site recruitment: Not reported
Mayo Clinic Jacksonville, Florida, United States Site recruitment: Not reported
University Of Miami Center for Liver Diseases Miami, Florida, United States Site recruitment: Not reported
Digestive Healthcare of Georgia Atlanta, Georgia, United States Site recruitment: Not reported
Center for Digestive and Liver Health Savannah, Georgia, United States Site recruitment: Not reported
Idaho Gastroenterology Associates Meridian, Idaho, United States Site recruitment: Not reported
University of Chicago Hospital & Clinic Chicago, Illinois, United States Site recruitment: Not reported
University of Louisville Louisville, Kentucky, United States Site recruitment: Not reported
LSU Healthcare Network New Orleans, Louisiana, United States Site recruitment: Not reported
Johns Hopkins University Baltimore, Maryland, United States Site recruitment: Not reported
Chevy Chase Clinical Research Chevy Chase, Maryland, United States Site recruitment: Not reported
Endoscopic Microsurgery Associates Towson, Maryland, United States Site recruitment: Not reported
New England Medical Center Boston, Massachusetts, United States Site recruitment: Not reported
William Beaumont Hospital Royal Oak, Michigan, United States Site recruitment: Not reported
Mississippi Gastrointestinal Associates Jackson, Mississippi, United States Site recruitment: Not reported
Bradley Freilich MD, LLC Kansas City, Missouri, United States Site recruitment: Not reported
VAMC Kansas City, Missouri, United States Site recruitment: Not reported
North Shore University Hospital Manhasset, New York, United States Site recruitment: Not reported
NYU Gastroenterology & Hepatology New York, New York, United States Site recruitment: Not reported
VA Harbor HealthCare System New York, New York, United States Site recruitment: Not reported
Carolinas Center for Liver Disease Charlotte, North Carolina, United States Site recruitment: Not reported
Duke University Medical Center Durham, North Carolina, United States Site recruitment: Not reported
University of Cincinnati College of Medicine Cincinnati, Ohio, United States Site recruitment: Not reported
Metro Health Medical Ctr. Cleveland, Ohio, United States Site recruitment: Not reported
The Cleveland Clinic Foundation Cleveland, Ohio, United States Site recruitment: Not reported
Oregon Health Sciences University Portland, Oregon, United States Site recruitment: Not reported
Albert Einstein Medical Center Philadelphia, Pennsylvania, United States Site recruitment: Not reported
Jefferson University Physicians Philadelphia, Pennsylvania, United States Site recruitment: Not reported
University of Pennsylvania Philadelphia, Pennsylvania, United States Site recruitment: Not reported
Advanced Clinical Research Providence, Rhode Island, United States Site recruitment: Not reported
Medical University of South Carolina Charleston, South Carolina, United States Site recruitment: Not reported
University of Tennessee Gastroenterology Memphis, Tennessee, United States Site recruitment: Not reported
Austin Gastroenterology PA Austin, Texas, United States Site recruitment: Not reported
Baylor University Medical Ctr. Dallas, Texas, United States Site recruitment: Not reported
Baylor College of Medicine Houston, Texas, United States Site recruitment: Not reported
Baylor, VAMC Houston, Texas, United States Site recruitment: Not reported
Metropolitan Research Fairfax, Virginia, United States Site recruitment: Not reported
McGuire DVAMC Richmond, Virginia, United States Site recruitment: Not reported
Wisconsin Center for Advanced Research Milwaukee, Wisconsin, United States Site recruitment: Not reported
Ponce School of Medicine Ponce, Puerto Rico Site recruitment: Not reported
Fundacion de Investigacion de Diego Santurce, Puerto Rico Site recruitment: Not reported
Start: Not reported. Completion: Not reported (may be estimated). No results posted in this registry response.
Products and interventions (2)
Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.
Thymalfasin (thymosin alpha-1) (drug)
Trans arterial chemoembolization (TACE) (procedure)
Where the study takes place — 5 listed sites
Site status can differ from overall study status. This list includes all reported sites, even when your search specifies one location. Confirm availability and eligibility with the study team through the original record.
California Pacific Medical Center San Francisco, California, United States Site recruitment: Not reported
University of Florida Gainesville, Florida, United States Site recruitment: Not reported
William Beaumont Hospital Royal Oak, Michigan, United States Site recruitment: Not reported
Columbia University New York, New York, United States Site recruitment: Not reported
Metropolitan Research Fairfax, Virginia, United States Site recruitment: Not reported
Site status can differ from overall study status. This list includes all reported sites, even when your search specifies one location. Confirm availability and eligibility with the study team through the original record.
University of Alabama - Knollwood Physician's Group Bldg. Mobile, Alabama, United States Site recruitment: Not reported
Mayo Clinic Scottsdale, Arizona, United States Site recruitment: Not reported
Gastroenterology Associates of East Bay Medical Group Berkeley, California, United States Site recruitment: Not reported
Scripps Clinic La Jolla, California, United States Site recruitment: Not reported
Cedars-Sinai Medical Center Los Angeles, California, United States Site recruitment: Not reported
California Pacific Medical Center San Francisco, California, United States Site recruitment: Not reported
Veterans Administration Medical Center GI Section (111B) San Francisco, California, United States Site recruitment: Not reported
Walter Reed Army Medical Center Washington D.C., District of Columbia, United States Site recruitment: Not reported
Washington Hospital Center Washington D.C., District of Columbia, United States Site recruitment: Not reported
University of Florida Gainesville, Florida, United States Site recruitment: Not reported
Mayo Clinic Jacksonville, Florida, United States Site recruitment: Not reported
University of Miami Center for Liver Diseases Miami, Florida, United States Site recruitment: Not reported
Atlanta Gastroenterology Associates Atlanta, Georgia, United States Site recruitment: Not reported
Center for Digestive and Liver Health Savannah, Georgia, United States Site recruitment: Not reported
Idaho Gastroenterology Associates Meridian, Idaho, United States Site recruitment: Not reported
University of Chicago Hospital & Clinic Chicago, Illinois, United States Site recruitment: Not reported
Hepatitis C Treatment Centers, Inc. Louisville, Kentucky, United States Site recruitment: Not reported
Liver Research Center - University of Louisville Louisville, Kentucky, United States Site recruitment: Not reported
Louisiana State University Healthcare Network New Orleans, Louisiana, United States Site recruitment: Not reported
Johns Hopkins University Baltimore, Maryland, United States Site recruitment: Not reported
Chevy Chase Clinical Research Chevy Chase, Maryland, United States Site recruitment: Not reported
New England Medical Center Boston, Massachusetts, United States Site recruitment: Not reported
University of Massachusetts Memorial Medical Center Worcester, Massachusetts, United States Site recruitment: Not reported
William Beaumont Hospital Royal Oak, Michigan, United States Site recruitment: Not reported
Mississippi Gastrointestinal Associates Jackson, Mississippi, United States Site recruitment: Not reported
VAMC Kansas City, Missouri, United States Site recruitment: Not reported
Saint Louis University Hospital St Louis, Missouri, United States Site recruitment: Not reported
North Shore University Hospital Manhasset, New York, United States Site recruitment: Not reported
Bronx VA Medical Center New York, New York, United States Site recruitment: Not reported
NY VAMC New York, New York, United States Site recruitment: Not reported
NYU Hospitals Center New York, New York, United States Site recruitment: Not reported
Carolinas Center for Liver Diseases Charlotte, North Carolina, United States Site recruitment: Not reported
Duke University Medical Center Durham, North Carolina, United States Site recruitment: Not reported
University of Cincinnati - College of Medicine Cincinnati, Ohio, United States Site recruitment: Not reported
Metro Health Medical Center, GI Division Cleveland, Ohio, United States Site recruitment: Not reported
Oregon Health Sciences University Portland, Oregon, United States Site recruitment: Not reported
University of Pennsylvania Hospital Philadelphia, Pennsylvania, United States Site recruitment: Not reported
Roger Williams Medical Center Providence, Rhode Island, United States Site recruitment: Not reported
GI Center MidSouth Memphis, Tennessee, United States Site recruitment: Not reported
University of Tennessee Gastroenterology Memphis, Tennessee, United States Site recruitment: Not reported
Baylor University Medical Center Dallas, Texas, United States Site recruitment: Not reported
University of Texas Southwestern Medical Center Dallas, Texas, United States Site recruitment: Not reported
Baylor, VAMC Houston, Texas, United States Site recruitment: Not reported
Metropolitan Research Fairfax, Virginia, United States Site recruitment: Not reported
McGuire Research Institute Richmond, Virginia, United States Site recruitment: Not reported
Wisconsin Center for Advanced Research Milwaukee, Wisconsin, United States Site recruitment: Not reported
Ponce School of Medicine Ponce, Puerto Rico Site recruitment: Not reported
Fundacion de Investigacion de Diego Santurce, Puerto Rico Site recruitment: Not reported
Start: 2007-12. Completion: 2010-12 (may be estimated). No results posted in this registry response.
Products and interventions (1)
Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.
Thymosin alpha 1 (drug)
Where the study takes place — 1 listed sites
Site status can differ from overall study status. This list includes all reported sites, even when your search specifies one location. Confirm availability and eligibility with the study team through the original record.
Hematology Section, University of Perugia Perugia, Perugia, Italy Site recruitment: Not reported
Registry directory checked October 5, 2026 against the WHO registry network. This is a starting point, not complete coverage of every country or continent. Record availability, language and update schedules vary by registry.
Site recruitment: Not reported
Petz Aladar Megyei Korhaz, Borgyogyaszat Győr, Hungary Site recruitment: Not reported
Miskolc Megyei Korhaz Borgyogyaszat Miskolc, Hungary Site recruitment: Not reported
Pecsi Egyetem Borgyogyaszati Klinika Pécs, Hungary Site recruitment: Not reported
Szegedi Egyetem Borgyogyaszati Klinika Szeged, Hungary Site recruitment: Not reported
Ospedale SS Trinità Oncologia Sora, FROSINONE, Italy Site recruitment: Not reported
Ospedale San Vincenzo U.O. Oncologia Medica Taormina, MESSINA, Italy Site recruitment: Not reported
UO Complessa Aziendale Nettuno/Albano/Frascati Day-Hospital di Oncologia Ospedale S. Giuseppe Albano Laziale, ROMA, Italy Site recruitment: Not reported
Ospedale PF Calvi Dipartimento di Oncologia Noale, VENEZIA, Italy Site recruitment: Not reported
ASL 1 Servizio di Oncologia Agrigento, Italy Site recruitment: Not reported
Azienda Ospedaliera S. Elia, UO di Oncologia Caltanissetta, Italy Site recruitment: Not reported
Azienda Ospedaliera Garibaldi, UO Oncologia Medica Catania, Italy Site recruitment: Not reported
Università "G. D'Annunzio" Facoltà di Medicina e Chirurgia, Clinica Dermatologica Chieti, Italy Site recruitment: Not reported
Azienda Ospedaliera Umberto I° UO Servizio di Oncologia e Chemioterapia Enna, Italy Site recruitment: Not reported
Università di Firenze Dipartimento di Scienze Dermatologiche Florence, Italy Site recruitment: Not reported
Ospedale Pierantoni, Divisione Oncologia Medica Forlì, Italy Site recruitment: Not reported
Istituto NazionaleRicerca sul Cancro, Dipartimento di Oncologia Medica 1 Genova, Italy Site recruitment: Not reported
Istituto Europeo di Oncologia, Divisione di Chirurgia Generale Milan, Italy Site recruitment: Not reported
Casa di Cura San Pio X, UO Oncologia Medica Milan, Italy Site recruitment: Not reported
Ospedale Civile, UO di Oncologia Ragusa, Italy Site recruitment: Not reported
Azienda Ospedaliera Bianchi-Melacrino-Morelli, Oncologia Medica Reggio Calabria, Italy Site recruitment: Not reported
Università di Roma "Tor Vergata" Oncologia Complementare, Dipartimento di Chirurgia Roma, Italy Site recruitment: Not reported
IFO Polo Oncologico Ist. Regina Elena, Divisione di Oncologia Medica A Roma, Italy Site recruitment: Not reported
Ospedale Sandro Pertini, Oncologia Medica Roma, Italy Site recruitment: Not reported
Università "La Sapienza" Dipartimento di Malattie Cutanee-Veneree e Chirurgia Plastica Ricostruttiva Roma, Italy Site recruitment: Not reported
Istituto Dermopatico dell'Immacolata, Dipartimento di Immunodermatologia Roma, Italy Site recruitment: Not reported
Policlinico "Le Scotte" Dipartimento di Medicina Clinica, Scienze Immunologiche Applicate, Divisione di Dermatologia Siena, Italy Site recruitment: Not reported
U.O. Complessa, Immunoterapia Oncologica, Policlinico "Le Scotte" Siena, Italy Site recruitment: Not reported
Ospedale Umberto I°, Divisione di Oncologia Medica Syracuse, Italy Site recruitment: Not reported
Ospedale Bel Colle UO di Oncologia Viterbo, Italy Site recruitment: Not reported
Katedra i Klinika Onkologii i Radioterapii Akademia Medyczna Gdansk, Poland Site recruitment: Not reported
Instytut Onkologii im. Marii Sklodowskiej-Curie, Oddzial w Krakowie, Klinika Chemioterapii Krakow, Poland Site recruitment: Not reported
Wojewodzki Szpital Specjalistyczny im. M. Kopernika, Klinika Chemioterapii Oncologicznej Lodz, Poland Site recruitment: Not reported
Samodzielny Publiczny Szpital Kliniczny nr 1, Klinika Chirurgii Onkologicznej Lublin, Poland Site recruitment: Not reported
Wielkopolskie Centrum Onkologii, Zaklad Immunologii Nowotworow Katedry Onkologii AM Poznan, Poland Site recruitment: Not reported
Oddzial Chemioterapii Szczecin, Poland Site recruitment: Not reported
Klinika Onkologii Centralnego Szpitala WAM Warsaw, Poland Site recruitment: Not reported
Dolnoslakie Centrum Transplantacji Komorkowych z Krajowym Bankiem Dawcow Szpiku Wroclaw, Poland Site recruitment: Not reported
Instituto Portugues de Oncologia de Francisco Gentil, Centro Regional de Oncologia de Lisboa S.A., Servicio de Medicina Oncologica 1, Pavilhao C Lisbon, Portugal Site recruitment: Not reported
Instituto Portugues de Oncologia de Francisco Gentil, Centro Regional de Oncologia do Porto S.A., Servicio de Medicina Oncologica, Piso 3 Porto, Portugal Site recruitment: Not reported
Instituto Catalan Oncologico, Servicio de Oncologia L'Hospitalet de Llobregat, BARCELONA, Spain Site recruitment: Not reported
Hosp. Univ. de Canarias Servicio de Oncologia Medica San Cristóbal de La Laguna, SANTA CRUZ DE TENERIFE, Spain Site recruitment: Not reported
Hosp. Clinic i Provincial Servicio de Oncologia Barcelona, Spain Site recruitment: Not reported
Hosp. Universitario de Jaen Servicio de Oncologia Jaén, Spain Site recruitment: Not reported
Hosp. Clinico San Carlos Servicio de Oncologia, Pabellon B, Ala Sur-Sotano Madrid, Spain Site recruitment: Not reported
Hosp. Virgen de la Victoria de Malaga Servicio de Oncologia 1a planta Campus Universitario de Teatinos Málaga, Spain Site recruitment: Not reported
Hosp. Virgen del Rocio Servicio de Oncologia, Planta Baja - Centro de Diagnostico Seville, Spain Site recruitment: Not reported
Instituto Valenciano Oncologico Valencia, Spain Site recruitment: Not reported
Hospital General Universitario de Valencia Unidad de Oncologia Medica Valencia, Spain Site recruitment: Not reported
Zentrum fur Onkologie Hematologie und Transfusionsmedizin am Kantonsspital Aarau Aarau, Switzerland Site recruitment: Not reported