YARTEMLEA® (narsoplimab-wuug) was approved by the FDA in December 2025.

YARTEMLEA®

YARTEMLEA is a fully human monoclonal antibody targeting mannan-binding lectin-associated serine protease-2 (MASP-2), the effector enzyme of the lectin pathway of complement.

Importantly, inhibition of MASP-2 preserves the classical and alternative complement functions critical for defense against infection.

Omeros is pursuing approval in Europe for narsoplimab to treat TA-TMA.

To learn more, visit YARTEMLEA.com.

To view full Prescribing Information, click here.

Narsoplimab OMS721 MASP-2 antibody inhibitor, breakthrough therapy and orphan drug for HSCT-TMA
View our pipeline to learn about ongoing narsoplimab clinical studies