Johnson & JohnsonFDA approval of Imaavy as first treatment for wAIHA

Johnson & Johnson announced that the FDA has approved Imaavy, also known as nipocalimab-aahu, for the treatment of warm autoimmune hemolytic anemia in adults and pediatric patients aged 12 years and above who are currently or have been previously treated with corticosteroids. The approval makes Imaavy the first FDA-approved treatment specifically indicated for wAIHA, a rare and potentially life-threatening autoimmune disease in which autoantibodies attack and destroy red blood cells, resulting in severe anemia and debilitating fatigue. The approval was based on data from the pivotal phase II/III ENERGY study, which showed that patients receiving the approved 30 mg/kg dose achieved a significantly higher rate of durable hemoglobin response compared with placebo, with approximately three times as many patients achieving durable hemoglobin levels by week 24. Imaavy also demonstrated a rapid treatment effect, with a mean hemoglobin increase of 1 g/dL as early as week 1, and patients treated with Imaavy showed a 3.5-point greater mean improvement in FACIT-Fatigue scores at week 24 compared with placebo. The latest approval marks an important milestone for J&J's immunology portfolio and provides Imaavy with an additional commercial opportunity beyond its existing use in generalized myasthenia gravis, for which it was approved in April 2025 in the U.S. and in December 2025 in the EU.
Johnson & JohnsonFDA approval of Imaavy as first treatment for wAIHA
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