Medical Uses
MIMRYLO (rusfertide), from Takeda, is the first hepcidin mimetic approved by the FDA. It treats erythrocytosis (too many red blood cells) in adults with polycythemia vera (PV), helping control haematocrit and cutting down the need for repeated phlebotomies (blood removal).
Rusfertide mimics hepcidin, the body’s natural iron-regulating hormone. It limits the iron available to the bone marrow, which slows excess red cell production. In the Phase 3 VERIFY trial, 76.9% of patients on rusfertide responded (no phlebotomy eligibility) versus 32.9% on placebo, and 62.6% kept haematocrit below 45% versus 14.4%. It is self-injected under the skin once a week, starting at 19 mg and adjusted up to a maximum of 108 mg weekly.
