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Showing 1–18 of 18 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: placebo, fostamatinib Clear all
Completed Phase 3 Interventional

Double-Blind, Randomized, Placebo-Controlled, Multi-Center Phase 3 Study to Evaluate the Efficacy and Safety of Fostamatinib in COVID-19 Subjects

NCT04629703
View directory record Official record
Conditions
Covid19, SARS (Severe Acute Respiratory Syndrome), SARS Pneumonia, SARS-Associated Coronavirus as Cause of Disease Classified Elsewhere, Pneumonia, Pneumonia, Viral
Interventions
Fostamatinib, Placebo
Drug
Lead sponsor
Rigel Pharmaceuticals
Industry
Eligibility
18 Years to 100 Years
Enrollment
280 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
9
States / cities
Orange, California • Washington D.C., District of Columbia • Hialeah, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Aug 17, 2023 · Synced Sep 28, 2026, 3:29 AM EDT
Completed Phase 3 Interventional Results available

A Phase 3, Multi-Center, Randomized, Double-Blind, Placebo-Controlled, Study of Fostamatinib Disodium in the Treatment of wAIHA

NCT03764618
View directory record Official record
Conditions
Warm Antibody Autoimmune Hemolytic Anemia
Interventions
Fostamatinib disodium, Placebo
Drug
Lead sponsor
Rigel Pharmaceuticals
Industry
Eligibility
18 Years to 100 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
26
States / cities
Gilbert, Arizona • Phoenix, Arizona • Tucson, Arizona + 22 more
Source: ClinicalTrials.gov public record
Updated May 24, 2023 · Synced Sep 28, 2026, 3:29 AM EDT
Completed Phase 2 Interventional Results available

Safety and Efficacy Study of Fostamatinib to Treat Immunoglobin A (IgA) Nephropathy

NCT02112838
View directory record Official record
Conditions
IGA Nephropathy
Interventions
Fostamatinib 150 mg, Fostamatinib 100 mg, Placebo
Drug
Lead sponsor
Rigel Pharmaceuticals
Industry
Eligibility
18 Years to 70 Years
Enrollment
76 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
4
States / cities
Palo Alto, California • Augusta, Georgia • Columbus, Ohio + 1 more
Source: ClinicalTrials.gov public record
Updated Jun 26, 2019 · Synced Sep 28, 2026, 3:29 AM EDT
Completed Phase 3 Interventional Results available

Evaluation of Effectiveness of Two Dosing Regimens of Fostamatinib Compared to Placebo in Patients With Rheumatoid Arthritis (RA) Who Are Taking Methotrexate But Not Responding.

NCT01197521
View directory record Official record
Conditions
Rheumatoid Arthritis
Interventions
fostamatinib, placebo, fostamatinib
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years and older
Enrollment
923 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
41
States / cities
Anniston, Alabama • Huntsville, Alabama • Tuscaloosa, Alabama + 38 more
Source: ClinicalTrials.gov public record
Updated Apr 6, 2014 · Synced Sep 28, 2026, 3:29 AM EDT
Completed Phase 2 Interventional Results available

Study of the Effect of Fostamatinib Twice Daily on Blood Pressure in Patients With Rheumatoid Arthritis

NCT01563978
View directory record Official record
Conditions
Rheumatoid Arthritis
Interventions
fostamatinib, placebo
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years and older
Enrollment
266 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
30
States / cities
Huntsville, Alabama • Huntington Beach, California • Santa Maria, California + 27 more
Source: ClinicalTrials.gov public record
Updated May 7, 2014 · Synced Sep 28, 2026, 3:29 AM EDT
Terminated Phase 2 Interventional Results available

Evaluation of Efficacy and Safety of Fostamatinib Monotherapy Compared With Adalimumab Monotherapy in Patients With Rheumatoid Arthritis (RA)

NCT01264770
View directory record Official record
Conditions
Rheumatoid Arthritis
Interventions
Fostamatinib and placebo injections, Adalimumab and placebo of fostamatinib, Placebo of fostamatinib, fostamatinib, and placebo injections
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years and older
Enrollment
644 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
40
States / cities
Birmingham, Alabama • Glendale, Arizona • Mesa, Arizona + 37 more
Source: ClinicalTrials.gov public record
Updated May 5, 2014 · Synced Sep 28, 2026, 3:29 AM EDT
Recruiting Phase 1 Interventional

Syk Inhibition in MItigating Lung Allograft Rejection (SIMILAR): A Trial to Evaluate the Safety and Tolerability of Fostamatinib in Lung Transplant Patients With Donor-Specific Antibodies

NCT06948097
View directory record Official record
Conditions
Lung Transplantation
Interventions
fostamatinib, Placebo
Drug
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
18 Years to 99 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
4
States / cities
Stanford, California • Baltimore, Maryland • Salt Lake City, Utah + 1 more
Source: ClinicalTrials.gov public record
Updated Sep 24, 2026 · Synced Sep 28, 2026, 3:29 AM EDT
Completed Phase 2 Interventional Results available

Efficacy and Safety Study of R935788 Tablets to Treat Rheumatoid Arthritis (Taski-3)

NCT00665626
View directory record Official record
Conditions
Rheumatoid Arthritis
Interventions
Fostamatinib disodium (R935788), Placebo
Drug
Lead sponsor
Rigel Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
219 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
27
States / cities
Aventura, California • Palm Desert, California • San Diego, California + 24 more
Source: ClinicalTrials.gov public record
Updated Apr 30, 2017 · Synced Sep 28, 2026, 3:29 AM EDT
Completed Phase 2 Interventional Results available

Efficacy and Safety Study of R935788 Tablets to Treat Rheumatoid Arthritis

NCT00665925
View directory record Official record
Conditions
Rheumatoid Arthritis
Interventions
Fostamatinib disodium (R935788), Placebo
Drug
Lead sponsor
Rigel Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
457 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
24
States / cities
La Jolla, California • Palm Desert, California • Hamden, Connecticut + 21 more
Source: ClinicalTrials.gov public record
Updated Sep 15, 2016 · Synced Sep 28, 2026, 3:29 AM EDT
Completed Phase 3 Interventional Results available

Evaluation of Effectiveness of Two Dosing Regimens of Fostamatinib Compared to Placebo in Patients With Rheumatoid Arthritis (RA) Who Are Taking Methotrexate and Have Had Inadequate Response to Single TNF-alpha Antagonist

NCT01197755
View directory record Official record
Conditions
Rheumatoid Arthritis
Interventions
fostamatinib, placebo
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years and older
Enrollment
323 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
67
States / cities
Anniston, Alabama • Huntsville, Alabama • Tuscaloosa, Alabama + 64 more
Source: ClinicalTrials.gov public record
Updated Apr 6, 2014 · Synced Sep 28, 2026, 3:29 AM EDT
Completed Phase 3 Interventional Results available

A Efficacy and Safety Study of R935788 in the Treatment of Persistent/Chronic Immune Thrombocytopenic Purpura (ITP)

NCT02076399
View directory record Official record
Conditions
Immune Thrombocytopenic Purpura
Interventions
Fostamatinib disodium, Placebo
Drug
Lead sponsor
Rigel Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
76 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
13
States / cities
Tucson, Arizona • Los Angeles, California • Lakeland, Florida + 10 more
Source: ClinicalTrials.gov public record
Updated Feb 11, 2019 · Synced Sep 28, 2026, 3:29 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study to Assess the Safety, Tolerability, and Blood and Urine Drug Levels of Fostamatinib Disodium (FosD) in Healthy Japanese and White Subjects

NCT01167868
View directory record Official record
Conditions
Healthy
Interventions
FosD, Placebo
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
20 Years to 45 Years
Enrollment
56 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Glendale, California
Source: ClinicalTrials.gov public record
Updated Feb 6, 2013 · Synced Sep 28, 2026, 3:29 AM EDT
Completed Phase 2Phase 3 Interventional Results available

Novel Experimental COVID-19 Therapies Affecting Host Response

NCT04924660
View directory record Official record
Conditions
COVID-19, SARS-CoV-2 Infection, Coronavirus Infection
Interventions
TXA127, TRV027, Placebo, Fostamatinib
Drug
Lead sponsor
Sean Collins
Other
Eligibility
18 Years and older
Enrollment
1,060 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
51
States / cities
Birmingham, Alabama • Chandler, Arizona • Los Angeles, California + 40 more
Source: ClinicalTrials.gov public record
Updated Jan 21, 2025 · Synced Sep 28, 2026, 3:29 AM EDT
Completed Phase 3 Interventional Results available

A Efficacy and Safety Study of Fostamatinib in the Treatment of Persistent/Chronic Immune Thrombocytopenic Purpura (ITP)

NCT02076412
View directory record Official record
Conditions
Immune Thrombocytopenic Purpura
Interventions
Fostamatinib Disodium, Placebo
Drug
Lead sponsor
Rigel Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
74 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Nyack, New York
Source: ClinicalTrials.gov public record
Updated Jan 24, 2019 · Synced Sep 28, 2026, 3:29 AM EDT
Completed Phase 2 Interventional Results available

Fostamatinib for Hospitalized Adults With COVID-19

NCT04579393
View directory record Official record
Conditions
Coronavirus Disease 2019
Interventions
Placebo, fostamatinib
Drug
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
18 Years and older
Enrollment
59 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
2
States / cities
Bethesda, Maryland • Falls Church, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 1, 2022 · Synced Sep 28, 2026, 3:29 AM EDT
Completed Phase 3 Interventional Results available

Evaluation of Effectiveness of Two Dosing Regimens of Fostamatinib Compared to Placebo in Patients With Rheumatoid Arthritis (RA) Who Are Taking Disease Modifying Anti-rheumatic Drug (DMARD) But Not Responding.

NCT01197534
View directory record Official record
Conditions
Rheumatoid Arthritis
Interventions
fostamatinib, placebo, fostamatinib
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years and older
Enrollment
913 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
57
States / cities
Birmingham, Alabama • Glendale, Arizona • Mesa, Arizona + 54 more
Source: ClinicalTrials.gov public record
Updated Apr 16, 2014 · Synced Sep 28, 2026, 3:29 AM EDT
Terminated Phase 2 Interventional Results available

Randomised Double-Blind, Placebo-Controlled, Parallel Group Study in Patients With Active Rheumatoid Arthritis:Magnetic Resonance Imaging Sub-Study

NCT02092961
View directory record Official record
Conditions
Rheumatoid Arthritis
Interventions
Fostamatinib, Adalimumab, Placebo of Fostamatinib, Placebo of Adalimumab
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years and older
Enrollment
198 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
6
States / cities
Glendale, Arizona • Paradise Valley, Arizona • Phoenix, Arizona + 3 more
Source: ClinicalTrials.gov public record
Updated Jun 24, 2014 · Synced Sep 28, 2026, 3:29 AM EDT
Completed Phase 2 Interventional

Treatment of Arthritis With Syk Kinase Inhibition (TASKI-1)

NCT00326339
View directory record Official record
Conditions
Rheumatoid Arthritis
Interventions
R788, Placebo
Drug
Lead sponsor
Rigel Pharmaceuticals
Industry
Eligibility
18 Years to 75 Years
Enrollment
189 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
27
States / cities
Santa Maria, California • Ocala, Florida • Orange Park, Florida + 22 more
Source: ClinicalTrials.gov public record
Updated Apr 19, 2009 · Synced Sep 28, 2026, 3:29 AM EDT