FDA Approves Imbruvica and Rituximab for Rare Disease

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FDA has approved Janssen Biotech and Pharmacyclics’ Imbruvica (ibrutinib) in combination with Genentech’s rituximab for treating Waldenström's macroglobulinemia (WM), a rare blood cancer. Imbruvica first received FDA approval in WM as monotherapy in 1/2015 under the breakthrough therapy designation pathway. This is the ninth FDA approval for Imbruvica, a first-in-class Bruton’s tyrosine kinase inhibitor.

 

Approval is based on results from the randomized, double-blind, placebo-controlled iNNOVATE study (PCYC-1127), the largest Phase 3 study of a non-chemotherapy combination in WM patients. At a median follow up of 26.5 months, a significant improvement in an independent review committee-assessed primary endpoint of progression-free survival was seen with Imbruvica plus rituximab when compared with placebo plus rituximab (30-month PFS rates were 82% vs. 28%, respectively), the companies say. “Patients in the Imbruvica plus rituximab treatment arm experienced an 80% reduction in relative risk of disease progression or death compared with patients treated with placebo plus rituximab,” they add.

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