FDA Approves Tibsovo for Some New AML Cases

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FDA has approved Servier Pharmaceuticals’ Tibsovo (ivosidenib) in combination with azacitidine (Bristol-Myers Squibb’s Onureg) for newly-diagnosed acute myeloid leukemia with a susceptible IDH1 mutation as detected by an FDA-approved test in adults age 75 or older who have comorbidities that preclude using intensive induction chemotherapy. An agency announcement says approval was based on a multi-center study of 146 patients with efficacy based on improvements in event-free survival, overall survival, and rate and duration of complete remission.

The most common adverse reactions to ivosidenib as monotherapy or in combination with azacitidine were diarrhea, fatigue, edema, nausea, vomiting, decreased appetite, leukocytosis, arthralgia, dyspnea, abdominal pain, mucositis, rash, electrocardiogram QT prolonged, differentiation syndrome, and myalgia.

The drug labeling includes a Boxed Warning for the risk of differentiation syndrome that may be life-threatening or fatal.

FDA says its review used the Real-Time Oncology Review pilot program and the Assessment Aid to approve the application about six weeks ahead of its goal date. The application was granted priority review and breakthrough designation.

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