FDA Approves New Tibsovo Indication

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FDA has approved a new indication for Servier Pharmaceuticals’ Tibsovo (ivosidenib) to treat adults with relapsed or refractory (R/R) myelodysplastic syndromes (MDS) with an isocitrate dehydrogenase-1 (IDH-1) mutation as detected by an FDA-approved test. An agency statement says this is the first targeted therapy approved for this indication. FDA also approved the Abbott RealTime IDH1 assay as a companion diagnostic for the selection of R/R MDS patients with an IDH-1 mutation.

Tibsovo was previously approved for certain adults with newly diagnosed acute myeloid leukemia (AML), R/R AML, and locally advanced or metastatic cholangiocarcinoma, FDA says. The Abbott IDH1 assay was previously approved as a companion diagnostic to identify AML patients with an IDH1 mutation for treatment with Tibsovo or Rigel Pharmaceuticals’ Rezlidhia (olutasidenib).

The notice says the Tibsovo labeling includes a Boxed Warning that an adverse reaction known as differentiation syndrome can occur and can be fatal if not treated. FDA granted the drug priority review, breakthrough therapy, and orphan drug designations.

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