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 20 on this page, newest registry updates first. Search checked 2026-11-08 17:38 UTC. Counts are registry matches, not unique peptides or a worldwide total.
Start: 2016-06-24. Completion: 2017-11-10 (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.
linaclotide (drug) — also listed as: ASP0456
Placebo (drug)
Where the study takes place — 39 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.
Site JP00029 Aichi, Japan Site recruitment: Not reported
Site JP00030Aichi, Japan
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.
Start: 2022-05-25. Completion: 2024-04-28 (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.
3L PEG + Linaclotide (drug)
3L PEG (drug)
2L PEG + Linaclotide (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.
Changhai Hospital, Naval Medical University Shanghai, China Site recruitment: Not reported
Start: 2022-08-01. Completion: 2023-07-15 (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.
3 L PEG + linaclotide (drug)
3 L PEG + placebo (drug)
Where the study takes place — 8 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.
Ningxia Hui Autonomous Region People's Hospital Yinchuan, Ningxia, China Site recruitment: Not reported
Xi'an Central Hospital Xi'an, Shaanxi, China Site recruitment: Not reported
Xi'an Jiaotong University Second Affiliated Hospital Xi'an, Shaanxi, China Site recruitment: Not reported
Air Force 986 Hospital Xi'an, Shaanxi, China Site recruitment: Not reported
Xijing Hospital of Digestive Diseases Xi'an, Shaanxi, China Site recruitment: Not reported
Shaanxi Provincial People's Hospital Xi'an, Shaanxi, China Site recruitment: Not reported
Linfen Central Hospital Linfen, Shanxi, China Site recruitment: Not reported
The Second Hospital of Shanxi Medical University Taiyuan, Shanxi, China Site recruitment: Not reported
Start: 2020-09-18. Completion: 2023-02-03 (may be estimated). No results posted in this registry response.
Products and interventions (0)
Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.
Where the study takes place — 29 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.
Research Site Baotou, China Site recruitment: Not reported
Research Site Beijing, China Site recruitment: Not reported
Research Site Beijing, China Site recruitment: Not reported
Research Site Binzhou, China Site recruitment: Not reported
Research Site Chengdu, China Site recruitment: Not reported
Research Site Chongqing, China Site recruitment: Not reported
Research Site Guangzhou, China Site recruitment: Not reported
Research Site Guangzhou, China Site recruitment: Not reported
Research Site Guangzhou, China Site recruitment: Not reported
Research Site Jinan, China Site recruitment: Not reported
Research Site Leshan, China Site recruitment: Not reported
Research Site Nanchang, China Site recruitment: Not reported
Research Site Nanjing, China Site recruitment: Not reported
Research Site Nanjing, China Site recruitment: Not reported
Research Site Qingdao, China Site recruitment: Not reported
Research Site Shanghai, China Site recruitment: Not reported
Research Site Shanghai, China Site recruitment: Not reported
Research Site Shanghai, China Site recruitment: Not reported
Research Site Shenyang, China Site recruitment: Not reported
Research Site Shenzhen, China Site recruitment: Not reported
Research Site Shenzhen, China Site recruitment: Not reported
Research Site Suzhou, China Site recruitment: Not reported
Research Site Taiyuan, China Site recruitment: Not reported
Research Site Tianjin, China Site recruitment: Not reported
Research Site Ürümqi, China Site recruitment: Not reported
Research Site Wenzhou, China Site recruitment: Not reported
Research Site Wuhan, China Site recruitment: Not reported
Research Site Xi'an, China Site recruitment: Not reported
Research Site Zhengzhou, China Site recruitment: Not reported
Start: 2017-01. Completion: 2022-04-29 (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.
Traditional dietary advice and low FODMAP content (other)
Low carbohydrate diet (other)
Optimized Medical treatment (other)
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.
Magnus Simren Gothenburg, Non-US/Non-Canadian, Sweden Site recruitment: Not reported
Start: 2018-01-01. Completion: 2022-05-01 (may be estimated). No results posted in this registry response.
Products and interventions (0)
Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.
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.
Maastricht University Medical Center Maastricht, Netherlands Site recruitment: Not reported
Start: 2019-10-14. Completion: 2021-04-20 (may be estimated). Results are posted in this registry.
Products and interventions (2)
Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.
Linaclotide (drug)
Placebo (drug)
Where the study takes place — 18 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.
Central Research Associates, Inc Birmingham, Alabama, United States Site recruitment: Not reported
HealthStar Research Hot Springs, Arkansas, United States Site recruitment: Not reported
Preferred Clinical Research Partners Little Rock, Arkansas, United States Site recruitment: Not reported
Advanced Research Center Anaheim, California, United States Site recruitment: Not reported
Kindred Medical Institute for Clinical Trials, LLC Corona, California, United States Site recruitment: Not reported
Center for Clinical Trials, LLC Paramount, California, United States Site recruitment: Not reported
Prohealth Research Center Doral, Florida, United States Site recruitment: Not reported
South Miami Medical & Research Group, Inc. Miami, Florida, United States Site recruitment: Not reported
River Birch Research Alliance, LLC Blue Ridge, Georgia, United States Site recruitment: Not reported
SleepCare Research Institute, Inc. Stockbridge, Georgia, United States Site recruitment: Not reported
Virgo Carter Pediatrics Silver Spring, Maryland, United States Site recruitment: Not reported
Minnesota Gastroenterology PA Minneapolis, Minnesota, United States Site recruitment: Not reported
David M. Headley, MD, P.A. Port Gibson, Mississippi, United States Site recruitment: Not reported
Foundation Pediatrics Med Clinical Research Partners, LLC East Orange, New Jersey, United States Site recruitment: Not reported
Advantage Clinical Trials The Bronx, New York, United States Site recruitment: Not reported
Coastal Pediatric Research Charleston, South Carolina, United States Site recruitment: Not reported
Coastal Pediatric Research Mt. Pleasant, South Carolina, United States Site recruitment: Not reported
Clinical Research Partners, LLC Richmond, Virginia, United States Site recruitment: Not reported
Start: 2021-01-01. Completion: 2022-02 (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.
Linaclotide (drug) — also listed as: Linzess
Lactulose (drug) — also listed as: Duphalac
Omeprazol (drug)
Itopride (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.
RenJiH Shanghai, Shanghai Municipality, China Site recruitment: Recruiting
Irritable Bowel Syndrome Characterized by Constipation
Sponsor
Ironwood Pharmaceuticals, Inc.
Countries with listed sites
United Kingdom
Registry dates and results
Start: 2016-12-21. Completion: 2018-10-31 (may be estimated). Results are posted in this registry.
Products and interventions (2)
Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.
Linaclotide (drug)
Placebo (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.
Peter Whorwell Wythenshawe, Manchester, United Kingdom 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.
The second affiliated hospital of xi'an jiaotong university Xi'an, Shaanxi, China Site recruitment: Recruiting
Start: 2021-09. Completion: 2022-06 (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.
HygiPrep (HyGIeaCare System) (device) — also listed as: HygiSample (stool collection for microbiome evaluation)
Where the study takes place — 0 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.
The registry does not list facilities in this record. This does not mean the study has no sites.
Start: 2016-03. Completion: 2021-03 (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.
questionnaires (other)
cognitive evaluation (other)
Blood (other)
Fecal sample (other)
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.
McMaster University Medical Centre Hamilton, Ontario, Canada Site recruitment: Not reported
Start: 2021-03-05. Completion: 2022-08-31 (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.
Linaclotide (drug)
LINZESS® (drug)
Placebo (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.
Renji Hospital, Medical Collge of Shanghai Jiaotong University Shanghai, Shanghai Municipality, China Site recruitment: Recruiting
Start: 2015-11-01. Completion: 2019-08-30 (may be estimated). Results are posted in this registry.
Products and interventions (5)
Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.
Linaclotide Dose A (drug) — also listed as: Linzess
Linaclotide Dose B (drug) — also listed as: Linzess
Linaclotide Dose C (drug) — also listed as: Linzess
Linaclotide Approved Adult Dose (drug) — also listed as: Linzess
Matching Placebo (drug) — also listed as: Linzess
Where the study takes place — 48 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.
HealthStar Research, LLC Hot Springs, Arkansas, United States Site recruitment: Not reported
Applied Research Center of Arkansas Little Rock, Arkansas, United States Site recruitment: Not reported
Advanced Research Center - Site 069 Anaheim, California, United States Site recruitment: Not reported
Kindred Medical Institute for Clinical Trials, LLC Corona, California, United States Site recruitment: Not reported
WCCT Global, LLC Costa Mesa, California, United States Site recruitment: Not reported
ACTCA, Inc Los Angeles, California, United States Site recruitment: Not reported
Children's Hospital Los Angeles Los Angeles, California, United States Site recruitment: Not reported
Center for Clinical Trials, LLC Paramount, California, United States Site recruitment: Not reported
University of California at San Francisco San Francisco, California, United States Site recruitment: Not reported
Advanced Medical Research Center Miami, Florida, United States Site recruitment: Not reported
Children's Center for Digestive Health Care LLC Atlanta, Georgia, United States Site recruitment: Not reported
Sleepcare Clinical Research Institute Stockbridge, Georgia, United States Site recruitment: Not reported
Methodist Medical Center Peoria, Illinois, United States Site recruitment: Not reported
Riley Hospital for Children at Indiana University Health Indianapolis, Indiana, United States Site recruitment: Not reported
Heartland Research Associates, LLC Wichita, Kansas, United States Site recruitment: Not reported
Willis-Knighton Physician Network Shreveport, Louisiana, United States Site recruitment: Not reported
Certified Research Consultants Virgo/Carter Pediatrics Silver Spring, Maryland, United States Site recruitment: Not reported
GI Associates and Endoscopy Center Jackson, Mississippi, United States Site recruitment: Not reported
Children's Mercy Hospital Kansas City, Missouri, United States Site recruitment: Not reported
Boys Town National Research Hospital Boys Town, Nebraska, United States Site recruitment: Not reported
Midwest Children Health Research Institute Lincoln, Nebraska, United States Site recruitment: Not reported
Midwest Children Health Research Institute Lincoln, Nebraska, United States Site recruitment: Not reported
Goryeb Children's Hospital Morristown, New Jersey, United States Site recruitment: Not reported
Columbia University Medical Center and Morgan Stanley Children's Hospital of New York New York, New York, United States Site recruitment: Not reported
Asheboro Research Associates - Site 022 Asheboro, North Carolina, United States Site recruitment: Not reported
Capital Pediatrics and Adolescent Center PLLC Raleigh, North Carolina, United States Site recruitment: Not reported
Cincinnati Children's Hospital Medical Center Cincinnati, Ohio, United States Site recruitment: Not reported
Ohio Pediatric Research Association Dayton, Ohio, United States Site recruitment: Not reported
IPS Research Company Oklahoma City, Oklahoma, United States Site recruitment: Not reported
St. Christopher's Hospital for Children Philadelphia, Pennsylvania, United States Site recruitment: Not reported
Children's Hospital of Pittsburgh of UPMC Pittsburgh, Pennsylvania, United States Site recruitment: Not reported
Preferred Primary Care Physicians, Inc. Pittsburgh, Pennsylvania, United States Site recruitment: Not reported
Frontier Clinical Research, LLC Scottdale, Pennsylvania, United States Site recruitment: Not reported
Montgomery Medical Inc. Smithfield, Pennsylvania, United States Site recruitment: Not reported
Rhode Island Hospital Providence, Rhode Island, United States Site recruitment: Not reported
Coastal Pediatric Research Charleston, South Carolina, United States Site recruitment: Not reported
Coastal Pediatrics Associates Mt. Pleasant, South Carolina, United States Site recruitment: Not reported
Cook Children's Medical Center Fort Worth, Texas, United States Site recruitment: Not reported
Texas Children's Hospital/Baylor College Medicine Houston, Texas, United States Site recruitment: Not reported
Houston Clinical Research Associates Houston, Texas, United States Site recruitment: Not reported
Sun Research Institute San Antonio, Texas, United States Site recruitment: Not reported
ClinPoint Trials Waxahachie, Texas, United States Site recruitment: Not reported
Children's Hospital of The King's Daughters Norfolk, Virginia, United States Site recruitment: Not reported
Virginia Tech Carilion School of Medicine Pediatric Gastroenterology Roanoke, Virginia, United States Site recruitment: Not reported
MultiCare Institute for Research and Innovation Tacoma, Washington, United States Site recruitment: Not reported
Aurora Health Care, Aurora Medical Center in Summit Summit, Wisconsin, United States Site recruitment: Not reported
Children's Hospital of Western Ontario London, Ontario, Canada Site recruitment: Not reported
Physician's Clinical Research Inc. Vaughan, Ontario, Canada Site recruitment: Not reported
Breast Feeding; Constipation; Irritable Bowel Syndrome
Sponsor
Forest Laboratories
Countries with listed sites
United States
Registry dates and results
Start: 2014-07-31. Completion: 2019-05-31 (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.
linaclotide (drug) — also listed as: Linzess
Where the study takes place — 2 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 Iowa Iowa City, Iowa, United States Site recruitment: Not reported
Digestive Disease Specialists Inc (DDSI) Oklahoma City, Oklahoma, United States Site recruitment: Not reported
Irritable Bowel Syndrome Characterized by Constipation
Sponsor
Ironwood Pharmaceuticals, Inc.
Countries with listed sites
United States
Registry dates and results
Start: 2018-06-20. Completion: 2019-04-10 (may be estimated). Results are posted in this registry.
Products and interventions (2)
Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.
Linaclotide (drug) — also listed as: Linzess
Placebo (drug)
Where the study takes place — 79 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.
Clinical Research Associates Huntsville, Alabama, United States Site recruitment: Not reported
Elite Clinical Studies Phoenix, Arizona, United States Site recruitment: Not reported
Adobe Clinical Research, LLC Tucson, Arizona, United States Site recruitment: Not reported
Arkansas Gastroenterology North Little Rock, Arkansas, United States Site recruitment: Not reported
GW Research, Inc. Chula Vista, California, United States Site recruitment: Not reported
Kindred Medical Institute for Clinical Trials, LLC Corona, California, United States Site recruitment: Not reported
Diagnamics, Inc. Encinitas, California, United States Site recruitment: Not reported
MD Studies, Inc. Fountain Valley, California, United States Site recruitment: Not reported
Paragon Rx Clinical, Inc. - Garden Grove Garden Grove, California, United States Site recruitment: Not reported
Grossmont Center For Clinical Research La Mesa, California, United States Site recruitment: Not reported
Facey Medical Foundation Mission Hills, California, United States Site recruitment: Not reported
Providence Clinical Research North Hollywood, California, United States Site recruitment: Not reported
Precision Research Institute San Diego, California, United States Site recruitment: Not reported
Paragon Rx Clinical, Inc.- Santa Ana Santa Ana, California, United States Site recruitment: Not reported
Millennium Clinical Trials Thousand Oaks, California, United States Site recruitment: Not reported
St. Joseph Heritage Healthcare Yorba Linda, California, United States Site recruitment: Not reported
Connecticut Clinical Research Institute Bristol, Connecticut, United States Site recruitment: Not reported
Chase Medical Research, LLC Waterbury, Connecticut, United States Site recruitment: Not reported
Clinical Research of South Florida Coral Gables, Florida, United States Site recruitment: Not reported
Avail Clinical Research, LLC DeLand, Florida, United States Site recruitment: Not reported
Palmetto Research, LLC Hialeah, Florida, United States Site recruitment: Not reported
Nature Coast Clinical Research, LLC Inverness, Florida, United States Site recruitment: Not reported
The Chappel Group Research Kissimmee, Florida, United States Site recruitment: Not reported
Jesscan Medical Research Miami, Florida, United States Site recruitment: Not reported
Well Pharma Medical Research Corporation Miami, Florida, United States Site recruitment: Not reported
New Horizon Research Center Miami, Florida, United States Site recruitment: Not reported
San Marcus Research Clinic, Inc. Miami Lakes, Florida, United States Site recruitment: Not reported
Ocean Blue Medical Research Center, Inc. Miami Springs, Florida, United States Site recruitment: Not reported
Ormond Medical Arts Pharmaceutical Research Center Ormond Beach, Florida, United States Site recruitment: Not reported
Precision Clinical Research Sunrise, Florida, United States Site recruitment: Not reported
Meridien Research - Tampa Tampa, Florida, United States Site recruitment: Not reported
Palm Beach Research Center West Palm Beach, Florida, United States Site recruitment: Not reported
Research Institute of Central Florida, LLC Winter Park, Florida, United States Site recruitment: Not reported
Mount Vernon Clinical Research, LLC Sandy Springs, Georgia, United States Site recruitment: Not reported
Clinical Trials Management, LLC Metairie, Louisiana, United States Site recruitment: Not reported
Delta Research Partners, LLC Monroe, Louisiana, United States Site recruitment: Not reported
Louisiana Research Center, LLC Shreveport, Louisiana, United States Site recruitment: Not reported
Alan A. Rosen, MD, PA Baltimore, Maryland, United States Site recruitment: Not reported
Meritus Center For Clinical Research Hagerstown, Maryland, United States Site recruitment: Not reported
Boston Clinical Trials, Inc. Boston, Massachusetts, United States Site recruitment: Not reported
MedVadis Research Corporation Watertown, Massachusetts, United States Site recruitment: Not reported
Gastroenterology Associates of West Michigan Wyoming, Michigan, United States Site recruitment: Not reported
Gastrointestinal Associates PA Flowood, Mississippi, United States Site recruitment: Not reported
St. Louis Center For Clinical Research St Louis, Missouri, United States Site recruitment: Not reported
Bozeman Health Deaconess Hospital Bozeman, Montana, United States Site recruitment: Not reported
Clinical Research of South Nevada Las Vegas, Nevada, United States Site recruitment: Not reported
Healthwise Medical Associates Brooklyn, New York, United States Site recruitment: Not reported
Long Island Gastrointestinal Research Group, LLP Great Neck, New York, United States Site recruitment: Not reported
Carolina Digestive Health Associates Charlotte, North Carolina, United States Site recruitment: Not reported
Carolina Digestive Health Associates Concord, North Carolina, United States Site recruitment: Not reported
Cumberland Research Associates Fayetteville, North Carolina, United States Site recruitment: Not reported
Peters Medical Research, LLC High Point, North Carolina, United States Site recruitment: Not reported
Wake Research Associates, LLC Raleigh, North Carolina, United States Site recruitment: Not reported
PMG Research of Wilmington Wilmington, North Carolina, United States Site recruitment: Not reported
Clinical Trials of America - North Carolina, LLC Winston-Salem, North Carolina, United States Site recruitment: Not reported
Lyndhurst Clinical Research Winston-Salem, North Carolina, United States Site recruitment: Not reported
PMG Research of Winston-Salem Winston-Salem, North Carolina, United States Site recruitment: Not reported
Lillestol Research Fargo, North Dakota, United States Site recruitment: Not reported
Hightop Medical Research Center Cincinnati, Ohio, United States Site recruitment: Not reported
New Horizons Clinical Research Cincinnati, Ohio, United States Site recruitment: Not reported
Remington Davis, Inc. Columbus, Ohio, United States Site recruitment: Not reported
Dayton Gastroenterology, Inc. Dayton, Ohio, United States Site recruitment: Not reported
Hometown Urgent Care and Research Dayton, Ohio, United States Site recruitment: Not reported
Great Lakes Gastroenterology Research, LLC Mentor, Ohio, United States Site recruitment: Not reported
IPS Research Company Oklahoma City, Oklahoma, United States Site recruitment: Not reported
Partners In Clinical Research Cumberland, Rhode Island, United States Site recruitment: Not reported
Mountain View Clinical Research, Inc. Greer, South Carolina, United States Site recruitment: Not reported
Meridian Clinical Research Dakota Dunes, South Dakota, United States Site recruitment: Not reported
ClinSearch, LLC Chattanooga, Tennessee, United States Site recruitment: Not reported
New Phase Research & Development Knoxville, Tennessee, United States Site recruitment: Not reported
MW Clinical Research Center Beaumont, Texas, United States Site recruitment: Not reported
Southwest Clinical Trials Houston, Texas, United States Site recruitment: Not reported
Southwest Clinical Trials Houston, Texas, United States Site recruitment: Not reported
Quality Research, Inc. San Antonio, Texas, United States Site recruitment: Not reported
Diagnostics Research Group San Antonio, Texas, United States Site recruitment: Not reported
Stone Oak, LLC dba Discovery Clinical Trials San Antonio, Texas, United States Site recruitment: Not reported
Advanced Research Institute Ogden, Utah, United States Site recruitment: Not reported
New River Valley Research Institute Christiansburg, Virginia, United States Site recruitment: Not reported
Blue Ridge Medical Research Lynchburg, Virginia, United States Site recruitment: Not reported
Start: 2015-10-22. Completion: 2016-09-30 (may be estimated). Results are posted in this registry.
Products and interventions (2)
Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.
Linaclotide (drug)
Matching Placebo (drug)
Where the study takes place — 71 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.
Ironwood Investigational Site Huntsville, Alabama, United States Site recruitment: Not reported
Ironwood Investigational Site Phoenix, Arizona, United States Site recruitment: Not reported
Ironwood Investigational Site Tucson, Arizona, United States Site recruitment: Not reported
Ironwood Investigational Site North Little Rock, Arkansas, United States Site recruitment: Not reported
Ironwood Investigational Site Anaheim, California, United States Site recruitment: Not reported
Ironwood Investigational Site Chula Vista, California, United States Site recruitment: Not reported
Ironwood Investigational Site Garden Grove, California, United States Site recruitment: Not reported
Ironwood Investigational Site La Mesa, California, United States Site recruitment: Not reported
Ironwood Investigational Site Newport Beach, California, United States Site recruitment: Not reported
Ironwood Investigational Site Orange, California, United States Site recruitment: Not reported
Ironwood Investigational Site San Diego, California, United States Site recruitment: Not reported
Ironwood Investigational Site Thousand Oaks, California, United States Site recruitment: Not reported
Ironwood Investigational Site Colorado Springs, Colorado, United States Site recruitment: Not reported
Ironwood Investigational Site Bristol, Connecticut, United States Site recruitment: Not reported
Ironwood Investigational Site Waterbury, Connecticut, United States Site recruitment: Not reported
Ironwood Investigational Site Hialeah, Florida, United States Site recruitment: Not reported
Ironwood Investigational Site Kissimmee, Florida, United States Site recruitment: Not reported
Ironwood Investigational Site Miami, Florida, United States Site recruitment: Not reported
Ironwood Investigational Site Miami, Florida, United States Site recruitment: Not reported
Ironwood Investigational Site Miami, Florida, United States Site recruitment: Not reported
Ironwood Investigational Site Miami, Florida, United States Site recruitment: Not reported
Ironwood Investigational Site Orlando, Florida, United States Site recruitment: Not reported
Ironwood Investigational Site South Miami, Florida, United States Site recruitment: Not reported
Ironwood Investigational Site Tampa, Florida, United States Site recruitment: Not reported
Ironwood Investigational Site West Palm Beach, Florida, United States Site recruitment: Not reported
Ironwood Investigational Site Atlanta, Georgia, United States Site recruitment: Not reported
Ironwood Investigational Site Oakwood, Georgia, United States Site recruitment: Not reported
Ironwood Investigational Site Sandy Springs, Georgia, United States Site recruitment: Not reported
Ironwood Investigational Site Evansville, Indiana, United States Site recruitment: Not reported
Ironwood Investigational Site Bastrop, Louisiana, United States Site recruitment: Not reported
Ironwood Investigational Site Metairie, Louisiana, United States Site recruitment: Not reported
Ironwood Investigational Site Shreveport, Louisiana, United States Site recruitment: Not reported
Ironwood Investigational Site Baltimore, Maryland, United States Site recruitment: Not reported
Ironwood Investigational Site Chevy Chase, Maryland, United States Site recruitment: Not reported
Ironwood Investigational Site Boston, Massachusetts, United States Site recruitment: Not reported
Ironwood Investigational Site Watertown, Massachusetts, United States Site recruitment: Not reported
Ironwood Investigational Site Chesterfield, Michigan, United States Site recruitment: Not reported
Ironwood Investigational Site Wyoming, Michigan, United States Site recruitment: Not reported
Ironwood Investigational Site Jackson, Mississippi, United States Site recruitment: Not reported
Ironwood Investigational Site St Louis, Missouri, United States Site recruitment: Not reported
Ironwood Investigational Site Bozeman, Montana, United States Site recruitment: Not reported
Ironwood Investigational Site Las Vegas, Nevada, United States Site recruitment: Not reported
Ironwood Investigational Site Las Vegas, Nevada, United States Site recruitment: Not reported
Ironwood Investigational Site Brooklyn, New York, United States Site recruitment: Not reported
Ironwood Investigational Site Charlotte, North Carolina, United States Site recruitment: Not reported
Ironwood Investigational Site Concord, North Carolina, United States Site recruitment: Not reported
Ironwood Investigational Site Davidson, North Carolina, United States Site recruitment: Not reported
Ironwood Investigational Site Fayetteville, North Carolina, United States Site recruitment: Not reported
Ironwood Investigational Site Wilmington, North Carolina, United States Site recruitment: Not reported
Ironwood Investigational Site Winston-Salem, North Carolina, United States Site recruitment: Not reported
Ironwood Investigational Site Cincinnati, Ohio, United States Site recruitment: Not reported
Ironwood Investigational Site Cincinnati, Ohio, United States Site recruitment: Not reported
Ironwood Investigational Site Mentor, Ohio, United States Site recruitment: Not reported
Ironwood Investigational Site Xenia, Ohio, United States Site recruitment: Not reported
Ironwood Investigational Site Pittsburgh, Pennsylvania, United States Site recruitment: Not reported
Ironwood Investigational Site Dakota Dunes, South Dakota, United States Site recruitment: Not reported
Ironwood Investigational Site Bristol, Tennessee, United States Site recruitment: Not reported
Ironwood Investigational Site Chattanooga, Tennessee, United States Site recruitment: Not reported
Ironwood Investigational Site Knoxville, Tennessee, United States Site recruitment: Not reported
Ironwood Investigational Site Arlington, Texas, United States Site recruitment: Not reported
Ironwood Investigational Site Beaumont, Texas, United States Site recruitment: Not reported
Ironwood Investigational Site El Paso, Texas, United States Site recruitment: Not reported
Ironwood Investigational Site Houston, Texas, United States Site recruitment: Not reported
Ironwood Investigational Site San Antonio, Texas, United States Site recruitment: Not reported
Ironwood Investigational Site San Antonio, Texas, United States Site recruitment: Not reported
Ironwood Investigational Site San Antonio, Texas, United States Site recruitment: Not reported
Ironwood Investigational Site Ogden, Utah, United States Site recruitment: Not reported
Ironwood Investigational Site Sandy City, Utah, United States Site recruitment: Not reported
Ironwood Investigational Site Christiansburg, Virginia, United States Site recruitment: Not reported
Ironwood Investigational Site Lynchburg, Virginia, United States Site recruitment: Not reported
Ironwood Investigational Site La Crosse, Wisconsin, United States Site recruitment: Not reported
Irritable Bowel Syndrome With Constipation; Chronic Idiopathic Constipation
Sponsor
Forest Laboratories
Countries with listed sites
United States
Registry dates and results
Start: 2015-11-01. Completion: 2018-02-05 (may be estimated). Results are posted in this registry.
Products and interventions (1)
Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.
Linaclotide (drug) — also listed as: LINZESS®
Where the study takes place — 79 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.
Pinnacle Research Group, LLC Anniston, Alabama, United States Site recruitment: Not reported
North Alabama Research Center, LLC Athens, Alabama, United States Site recruitment: Not reported
Alliance Clinical Research Childersburg, Alabama, United States Site recruitment: Not reported
G & L Research, LLC Foley, Alabama, United States Site recruitment: Not reported
Radiant Research, Inc. Chandler, Arizona, United States Site recruitment: Not reported
Radiant Research, Inc. Scottsdale, Arizona, United States Site recruitment: Not reported
Clinical Research Institute of Arizona, LLC Surprise, Arizona, United States Site recruitment: Not reported
Clinical Research Consortium Tempe, Arizona, United States Site recruitment: Not reported
Desert Sun Clinical Research, LLC. Tucson, Arizona, United States Site recruitment: Not reported
Preferred Research Partners, Inc. Little Rock, Arkansas, United States Site recruitment: Not reported
Applied Research Center of Arkansas Little Rock, Arkansas, United States Site recruitment: Not reported
Kindred Medical Institute for Clinical Trials, LLC Corona, California, United States Site recruitment: Not reported
Global Clinical Trials LLC Costa Mesa, California, United States Site recruitment: Not reported
Diagnamics Inc Encinitas, California, United States Site recruitment: Not reported
MD Studies, Inc. Fountain Valley, California, United States Site recruitment: Not reported
Research Center of Fresno, Inc. Fresno, California, United States Site recruitment: Not reported
VVCRD Clinical Research Garden Grove, California, United States Site recruitment: Not reported
Facey Medical Foundation Mission Hills, California, United States Site recruitment: Not reported
Clinical Trials Research Sacramento, California, United States Site recruitment: Not reported
Northern California Research Sacramento, California, United States Site recruitment: Not reported
Artemis Institute for Clinical Research San Diego, California, United States Site recruitment: Not reported
Precision Research Institute San Diego, California, United States Site recruitment: Not reported
Empire Clinical Research Upland, California, United States Site recruitment: Not reported
Lynn Institute of Denver Denver, Colorado, United States Site recruitment: Not reported
ZASA Clinical Research Boynton Beach, Florida, United States Site recruitment: Not reported
Meridien Research Bradenton, Florida, United States Site recruitment: Not reported
Clinical Research of Brandon LLC Brandon, Florida, United States Site recruitment: Not reported
Clinical Physiology Associates Fort Myers, Florida, United States Site recruitment: Not reported
Direct Helpers Research Center Hialeah, Florida, United States Site recruitment: Not reported
Eastern Research, Inc. Hialeah, Florida, United States Site recruitment: Not reported
Center for Advanced Gastroenterology Maitland, Florida, United States Site recruitment: Not reported
Florida Medical Center and Research, Inc. Miami, Florida, United States Site recruitment: Not reported
Clinical Neuroscience Solutions, Inc Orlando, Florida, United States Site recruitment: Not reported
Accord Clinical Research Port Orange, Florida, United States Site recruitment: Not reported
Meridien Research St. Petersburg, Florida, United States Site recruitment: Not reported
River Birch Research Alliance, LLC Blue Ridge, Georgia, United States Site recruitment: Not reported
North Georgia Clinical Research Woodstock, Georgia, United States Site recruitment: Not reported
Northwest Clinical Trials Boise, Idaho, United States Site recruitment: Not reported
Rockford Gastroenterology Associates Rockford, Illinois, United States Site recruitment: Not reported
Iowa Digestive Center, PC Clive, Iowa, United States Site recruitment: Not reported
University of Iowa Hospitals and Clinics Iowa City, Iowa, United States Site recruitment: Not reported
Integrated Clinical Trial Services, Inc. West Des Moines, Iowa, United States Site recruitment: Not reported
Heartland Research Associates, LLC Newton, Kansas, United States Site recruitment: Not reported
Health Science Research Center Pratt, Kansas, United States Site recruitment: Not reported
Heartland Research Associates, LLC Wichita, Kansas, United States Site recruitment: Not reported
Heartland Research Associates, LLC Wichita, Kansas, United States Site recruitment: Not reported
KAMP Medical Research Inc Natchitoches, Louisiana, United States Site recruitment: Not reported
Coastal Research Associates, Inc. South Weymouth, Massachusetts, United States Site recruitment: Not reported
Bay State Clinical Trials, Inc. Watertown, Massachusetts, United States Site recruitment: Not reported
Aa Mrc Llc Flint, Michigan, United States Site recruitment: Not reported
Beyer Research Kalamazoo, Michigan, United States Site recruitment: Not reported
The Center for Clinical Trials, Inc. Biloxi, Mississippi, United States Site recruitment: Not reported
Sundance Clinical Research, LLC St Louis, Missouri, United States Site recruitment: Not reported
Digestive Health Associates Reno, Nevada, United States Site recruitment: Not reported
Albuquerque Clinical Trials Albuquerque, New Mexico, United States Site recruitment: Not reported
Lovelace Scientific Resources, Inc. Albuquerque, New Mexico, United States Site recruitment: Not reported
Drug Trials America Hartsdale, New York, United States Site recruitment: Not reported
Manhattan Medical Research Practice PLLC New York, New York, United States Site recruitment: Not reported
DiGiovanna Institute for Medical Education & Research North Massapequa, New York, United States Site recruitment: Not reported
UNC Health Care, University of North Carolina Medical Center, Memorial Hospital Chapel Hill, North Carolina, United States Site recruitment: Not reported
PharmQuest Greensboro, North Carolina, United States Site recruitment: Not reported
Northstate Clinical Research Lenoir, North Carolina, United States Site recruitment: Not reported
Digestive Health Specialists, PA Winston-Salem, North Carolina, United States Site recruitment: Not reported
New Horizons Clinical Research Cincinnati, Ohio, United States Site recruitment: Not reported
Clinical Inquest Center LTD Dayton, Ohio, United States Site recruitment: Not reported
Dayton Gastroenterology, Inc. Dayton, Ohio, United States Site recruitment: Not reported
IPS Research Company Oklahoma City, Oklahoma, United States Site recruitment: Not reported
The Clinical Trial Center, LLC Jenkintown, Pennsylvania, United States Site recruitment: Not reported
Temple University Philadelphia, Pennsylvania, United States Site recruitment: Not reported
Preferred Primary Care Physicians, INC Pittsburgh, Pennsylvania, United States Site recruitment: Not reported
Montgomery Medical, Inc. Smithfield, Pennsylvania, United States Site recruitment: Not reported
Partners In Clinical Research Cumberland, Rhode Island, United States Site recruitment: Not reported
Greenville Pharmaceutical Research, Inc. Greenville, South Carolina, United States Site recruitment: Not reported
Radiant Research, Inc. Greer, South Carolina, United States Site recruitment: Not reported
Clinical Neuroscience Solutions, Inc. Memphis, Tennessee, United States Site recruitment: Not reported
Houston Endoscopy & Research Center Houston, Texas, United States Site recruitment: Not reported
Research Across America Plano, Texas, United States Site recruitment: Not reported
Sun Research Institute San Antonio, Texas, United States Site recruitment: Not reported
Charlottesville Medical Research Center, LLC Charlottesville, Virginia, United States Site recruitment: Not reported
Start: 2014-09. Completion: 2016-06 (may be estimated). Results are posted in this registry.
Products and interventions (2)
Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.
Senna (drug) — also listed as: sennoside
Linzess (drug) — also listed as: Linaclotide
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.
TriHealth Cincinnati, Ohio, United States Site recruitment: Not reported
Functional Constipation in Children Ages 6-17 Years
Sponsor
Forest Laboratories
Countries with listed sites
Canada · United States
Registry dates and results
Start: 2015-11-03. Completion: 2018-05-29 (may be estimated). Results are posted in this registry.
Products and interventions (5)
Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.
Placebo (drug)
LIN Dose A (drug) — also listed as: LINZESS
LIN Dose B (drug) — also listed as: LINZESS
LIN Dose C (drug) — also listed as: LINZESS
LIN 145 µg (drug) — also listed as: LINZESS
Where the study takes place — 62 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.
HealthStar Research, LLC Hot Springs, Arkansas, United States Site recruitment: Not reported
Applied Research Center of Arkansas Little Rock, Arkansas, United States Site recruitment: Not reported
Advanced Research Center Anaheim, California, United States Site recruitment: Not reported
Kindred Medical Institute for Clinical Trials, LLC Corona, California, United States Site recruitment: Not reported
WCCT Global, LLC Costa Mesa, California, United States Site recruitment: Not reported
Ark Clinical Research Long Beach, California, United States Site recruitment: Not reported
ACTCA, Inc Los Angeles, California, United States Site recruitment: Not reported
Children's Hospital Los Angeles Los Angeles, California, United States Site recruitment: Not reported
Orange County Research Institute Ontario, California, United States Site recruitment: Not reported
Center for Clinical Trials, LLC Paramount, California, United States Site recruitment: Not reported
UCSD Rady Children's Hospital San Diego, California, United States Site recruitment: Not reported
University of California at San Francisco San Francisco, California, United States Site recruitment: Not reported
Ventura Clinical Trials Ventura, California, United States Site recruitment: Not reported
Colorado Springs Health Partners, HCP-Clinical Research, LLC Colorado Springs, Colorado, United States Site recruitment: Not reported
Nova Southeastern University Fort Lauderdale, Florida, United States Site recruitment: Not reported
Homestead Research Institute Homestead, Florida, United States Site recruitment: Not reported
RM Medical Research Homestead, Florida, United States Site recruitment: Not reported
Advanced Medical Research Center Miami, Florida, United States Site recruitment: Not reported
SCORE Physician Alliance, LLC St. Petersburg, Florida, United States Site recruitment: Not reported
Children's Center for Digestive Health Care LLC Atlanta, Georgia, United States Site recruitment: Not reported
Sleepcare Clinical Research Institute Stockbridge, Georgia, United States Site recruitment: Not reported
Riley Hospital for Children at Indiana University Health Indianapolis, Indiana, United States Site recruitment: Not reported
Heartland Research Associates, LLC Wichita, Kansas, United States Site recruitment: Not reported
Kentucky Pediatric/ Adult Research Bardstown, Kentucky, United States Site recruitment: Not reported
Kosair Children's Hospital - Pediatric Clinical Research Unit Louisville, Kentucky, United States Site recruitment: Not reported
Michael W. Simon, MD, PSC Nicholasville, Kentucky, United States Site recruitment: Not reported
Willis-Knighton Physician Network Shreveport, Louisiana, United States Site recruitment: Not reported
University of Maryland Children's Hospital Baltimore, Maryland, United States Site recruitment: Not reported
Massachusetts General Hospital Boston, Massachusetts, United States Site recruitment: Not reported
University Of Minnesota Minneapolis, Minnesota, United States Site recruitment: Not reported
GI Associates and Endoscopy Center Jackson, Mississippi, United States Site recruitment: Not reported
Craig A. Speigel, MD Bridgeton, Missouri, United States Site recruitment: Not reported
Midwest Children Health Research Institute Lincoln, Nebraska, United States Site recruitment: Not reported
Midwest Children Health Research Institute Lincoln, Nebraska, United States Site recruitment: Not reported
Goryeb Children's Hospital Morristown, New Jersey, United States Site recruitment: Not reported
Columbia University Medical Center and Morgan Stanley New York, New York, United States Site recruitment: Not reported
Asheboro Research Associates Asheboro, North Carolina, United States Site recruitment: Not reported
University of North Carolina at Chapel Hill Chapel Hill, North Carolina, United States Site recruitment: Not reported
Capital Pediatrics and Adolescent Center PLLC Raleigh, North Carolina, United States Site recruitment: Not reported
Ohio Pediatric Research Association Dayton, Ohio, United States Site recruitment: Not reported
IPS Research Company Oklahoma City, Oklahoma, United States Site recruitment: Not reported
Pediatric Care Specialists Johnstown, Pennsylvania, United States Site recruitment: Not reported
St. Christopher's Hospital for Children Philadelphia, Pennsylvania, United States Site recruitment: Not reported
Children's Hospital of Pittsburgh of UPMC Pittsburgh, Pennsylvania, United States Site recruitment: Not reported
Preferred Primary Care Physicians, Inc. Pittsburgh, Pennsylvania, United States Site recruitment: Not reported
Frontier Clinical Research, LLC Scottdale, Pennsylvania, United States Site recruitment: Not reported
Montgomery Medical Inc. Smithfield, Pennsylvania, United States Site recruitment: Not reported
Rhode Island Hospital Providence, Rhode Island, United States Site recruitment: Not reported
Coastal Pediatric Research Charleston, South Carolina, United States Site recruitment: Not reported
Coastal Pediatrics Associates Mt. Pleasant, South Carolina, United States Site recruitment: Not reported
Cook Children's Medical Center Fort Worth, Texas, United States Site recruitment: Not reported
Texas Children's Hospital/Baylor College Medicine Houston, Texas, United States Site recruitment: Not reported
Houston Clinical Research Associates Houston, Texas, United States Site recruitment: Not reported
Sun Research Institute San Antonio, Texas, United States Site recruitment: Not reported
Southwest Children's Research Associates, P.A. San Antonio, Texas, United States Site recruitment: Not reported
ClinPoint Trials Waxahachie, Texas, United States Site recruitment: Not reported
Foothill Family Clinic South / J. Lewis Research, Inc. Salt Lake City, Utah, United States Site recruitment: Not reported
Pediatric Specialists of Virginia Fairfax, Virginia, United States Site recruitment: Not reported
Virginia Tech Carilion School of Medicine Pediatric Roanoke, Virginia, United States Site recruitment: Not reported
Seattle Children's Hospital Seattle, Washington, United States Site recruitment: Not reported
Stollery Children's Hospital Edmonton, Alberta, Canada Site recruitment: Not reported
Children's Hospital of Western Ontario London, Ontario, Canada 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.