Recent Updates
Recently added Catalysts

Fostamatinib

Phase 3

Covid19 | Small molecule | Infectious Disease |Rigel Pharmaceuticals, Inc.|Last Updated: Feb 2, 2026

Success Probability
Subscribe to view
Market & Valuation
Subscribe to view
Trial Design
RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment280
FDA Designations
No designations recorded
Clinical trial landscape

Fostamatinib · 6 trials · 12 indications

Phase 3 1Phase 2 4Phase 1 1
NCT04629703Double-Blind, Randomized, Placebo-Controlled, Multi-Center Phase 3 Study to Evaluate the Efficacy and Safety of Fostamatinib in COVID-19 SubjectsCovid19
COMPLETED280 Analytics
PHASE3COMPLETED
Double-Blind, Randomized, Placebo-Controlled, Multi-Center Phase 3 Study to Evaluate the Efficacy and Safety of Fostamatinib in COVID-19 Subjects
Covid19Unlock trial analytics
Study Endpoints
Primary Endpoints
Number of days on oxygen from randomization on Day 1 to Day 29
29 days
Cumulative Incidence of Serious Adverse Events (SAEs) Through Day 30
Up to 30 days post-intervention

The cumulative incidence of serious adverse events (SAEs) occurring through day 30 following the intervention. An SAE is defined by the International Conference on Harmonization (ICH) guidelines as any adverse event fulfilling at least one of the following criteria: Results in death; Is life threatening; Requires in-subject hospitalization or prolongation of an existing hospitalization; Results in persistent or significant disability/incapacity; Is considered an important medical event (or medically significant)

Week 4 evaluation
4 weeks

Alterations in Gene Expression Profiling, cell counts (CD3+, CD11c+, Neutrophil Elastase+, CD20+, CD138+) at Week 4 compared to

Week 12 evaluation
12 weeks

Alterations in Gene Expression Profiling, cell counts (CD3+, CD11c+, Neutrophil Elastase+, CD20+, CD138+) at Week 12 compared to Baseline

Hemoglobin response
by Week 24

Hemoglobin level of \> 10 g/dL and 2 g/dL higher than the baseline hemoglobin

Mean Change of Proteinuria as Measured by Spot Urine Protein/Creatinine Ratio (sPCR) at Week 24
Baseline to 24 weeks

Mean change from Baseline (Visit 2) of proteinuria as measured by the spot Protein-Creatinine Ratio (sPCR) at 24 weeks (Visit 9) for the ITT Population

Overall Response Rate as Assessed According to the"Revised Response Criteria for Malignant Lymphoma" (Cheson 2007).
Serial tumor assessments were taken at baseline (within 28 days of the start of treatment), and re-evaluated at Day 57, and every 12 weeks thereafter or to confirm response . (Maximum duration of treatment 511 days, Maximum duration of follow-up 812 Days)

Proportion of patients with Complete Response (CR) or Partial Response (PR). Revised Response Criteria for Malignant Lymphoma categorises the response of the treatment of a patient's tumour to; CR: the disappearance of all evidence of disease; PR: ≥ 50% decrease in the sum of the perpendicular diameters (SPD) of the six largest dominant nodes plus no increase in the size of other nodes and no new sites of disease; Stable Disease (SD): less than a PR but not progressive disease; Relapsed Disease or PD: Any new lesion or increase by ≥ 50% of previously involved sites from nadir. Primary efficacy is based on Phase II patients only.

Clinical Benefit Rate as Assessed According to the "Revised Response Criteria for Malignant Lymphoma" (Cheson 2007).
Serial tumor assessments were taken at baseline (within 28 days of the start of treatment), and re-evaluated at Day 57, and every 12 weeks thereafter or to confirm response (Maximum duration of treatment 511 days, Maximum duration of follow-up 812 Days)

Proportion of patients with Complete Response (CR), Partial Response (PR), or Stable Disease (SD)

Secondary Endpoints
Mean change from baseline over time in clinical status score using the 8-point ordinal scale, to the average from Day 5 through Day 15.
10 days
Number of days in the ICU from randomization on Day 1 to Day 29
29 days
Time to first sustained hospital discharge by Day 29. (A discharge is defined as sustained when no readmission occurs by Day 29 after the discharge).
29 days
Unlock Study Endpoints
Study Design & Arms
AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Fostamatinib (150 mg twice daily for 14 days) + Standard of CareACTIVE_COMPARATORFostamatinib (150 mg twice daily for 14 days) + Standard of Care
Placebo (twice daily for 14 days) + Standard of CarePLACEBO_COMPARATORPlacebo (twice daily for 14 days) + Standard of Care
Standard of Care (SOC) + Placebo (BID for 14 Days)PLACEBO_COMPARATORParticipants randomized to this arm will receive standard of care (SOC) treatment plus placebo given twice daily for 14 days
Standard of Care (SOC) + Fostamatinib 150mg (BID for 14 Days)EXPERIMENTALParticipants randomized to this arm will receive standard of care (SOC) treatment plus fostamatinib 150mg given twice daily for 14 days
Open Label FostamatinibEXPERIMENTALOpen label Fostamatinib 100mg dose adjusted by the Principal Investigator after week 1
Fostamatinib 150 mgEXPERIMENTALFostamatinib 150 mg bid (morning and evening) over the course of 24 weeks
Fostamatinib 100 mgACTIVE_COMPARATORFostamatinib 100 mg tablet twice daily by mouth, over the course of 24 weeks
PlaceboPLACEBO_COMPARATORPlacebo tablet twice daily by mouth, over the course of 24 weeks
fostamatinibEXPERIMENTAL -
Interventions
NameTypeDescription
FostamatinibDRUGFostamatinib (150 mg twice daily) for 14 days and Standard of Care
PlaceboDRUGPlacebo (twice daily) for 14 days and Standard of Care
Fostamatinib 150 mg bidDRUGFostamatinib 150 mg bid. The dose of Fostamatinib may be reduced at any time to as low as 100 mg PO once daily (qd) if dose limiting adverse events are observed.
Fostamatinib 150 mgDRUGFostamatinib 150 milligram (mg) tablet twice daily by mouth, over the course of 24 weeks
Fostamatinib 100 mgDRUGFostamatinib 100 mg tablet twice daily by mouth, over the course of 24 weeks
Unlock Study Design Details
Eligibility Criteria
Age Range18 Years to 100 Years
SexALL
Healthy VolunteersNo
Study Sites47

Inclusion Criteria: * ≥18 years of age at screening. * The subject or a legally authorized representative has provided written informed consent. * Hospitalized COVID-19 subjects without respiratory failure who are either not receiving any oxygen therapy or are receiving supplemental oxygen via mask...

Countries:United StatesArgentinaBrazilMexicoAustraliaCanadaAustriaGermanyHong KongTaiwanUnited Kingdom
Unlock Eligibility Criteria
Recent Changes (Last 90 Days)
LOWMay 24, 2026NCT06564207studyFirstPostDate: changed