Quick answers
- What is Fostamatinib used for?
- The FDA-approved label (Tavalisse, Rigel Pharmaceuticals, Inc., November 5, 2025) says: “TAVALISSE is indicated for the treatment of thrombocytopenia in adult patients with chronic immune thrombocytopenia (ITP) who have had an insufficient response to a previous treatment. TAVALISSE is a kinase inhibitor indicated for the treatment of thrombocytopenia in adult patients with chronic immune thrombocytopenia (ITP) who have had an insufficient response to a previous treatment.” This page is not medical advice. Talk to your doctor or pharmacist before you start, stop or change any medicine.
- Does Fostamatinib have a boxed warning?
- No. None of the 1 FDA labels we found for this medicine has a boxed warning.
- Is there a shortage of Fostamatinib?
- No current shortage is listed by the FDA for the products of this medicine (FDA data from October 30, 2026).
- Has Fostamatinib been recalled?
- No recall linked to the products of this medicine appears in the FDA enforcement reports we use.
- Who makes Fostamatinib?
- 1 company lists prescription products of Fostamatinib in the FDA NDC Directory, including Rigel Pharmaceuticals, Inc..
What Fostamatinib is used for
Quoted from the “Indications and Usage” section of the FDA-approved label.
TAVALISSE is indicated for the treatment of thrombocytopenia in adult patients with chronic immune thrombocytopenia (ITP) who have had an insufficient response to a previous treatment. TAVALISSE is a kinase inhibitor indicated for the treatment of thrombocytopenia in adult patients with chronic immune thrombocytopenia (ITP) who have had an insufficient response to a previous treatment.
— FDA label: Tavalisse, Rigel Pharmaceuticals, Inc., effective November 5, 2025. Read the full label on DailyMed →
This page is not medical advice. Talk to your doctor or pharmacist before you start, stop or change any medicine.
Boxed warning
A boxed warning (“black box”) is the FDA’s strongest warning on a drug label, for serious or life-threatening risks.
The label quoted above has no boxed warning.
Forms and how it is given
| Dosage forms | Tablet |
|---|---|
| Route | Oral |
| Prescription products | 2 in the FDA NDC Directory |
| Brand names | Tavalisse |
Companies that list this medicine
Labelers in the FDA NDC Directory: the company named on the package (maker or distributor), with the number of prescription products.
- Rigel Pharmaceuticals, Inc.2 products
FDA approval history
- NDA: New Drug Application: how a new (usually brand-name) medicine is approved.
| Application | Sponsor | Approved | Later changes approved |
|---|---|---|---|
| NDA209299 TAVALISSE | Rigel Pharms | April 17, 2018 | 1, latest February 4, 2025 2025: Labeling |
Shortage status
The FDA drug shortage list does not show these products.
Recalls
No recall linked to these products (by their NDC code) appears in the FDA enforcement reports.
Official identifiers
| RxCUI (RxNorm) | 2044922, 2044928, 2044930, 2044932 |
|---|---|
| SPL set ID of the quoted label | 21149cc3-049b-43e2-b141-c9499160556c |
| FDA labels (SPL) | 1 |
| FDA applications | NDA209299 |
| Active ingredients (FDA) | FOSTAMATINIB |
Sources
- FDA-approved label on DailyMed (National Library of Medicine) — Tavalisse, Rigel Pharmaceuticals, Inc., effective November 5, 2025; via openFDA, FDA data exported October 30, 2026, retrieved October 31, 2026
- NDC Directory (openFDA) — U.S. Food and Drug Administration (FDA), FDA data exported October 30, 2026, retrieved October 31, 2026
- Drugs@FDA (openFDA) — U.S. Food and Drug Administration (FDA), FDA data exported October 30, 2026, retrieved October 31, 2026
- Drug recall enforcement reports (openFDA) — U.S. Food and Drug Administration (FDA), FDA data exported October 27, 2026, retrieved October 31, 2026
- Drug shortages (openFDA) — U.S. Food and Drug Administration (FDA), FDA data exported October 30, 2026, retrieved October 31, 2026
openFDA data is provided by the FDA as is; it may be incomplete. Always rely on the label that comes with your medicine. FDA Enforcement Report search →