FDA Drops REMS Need for ERA Meds

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FDA says a new analysis of human pregnancy data compiled from the use of endothelin receptor antagonist (ERA) medicines for 20 years found that REMS requirements about embryofetal toxicity (EFT) risk are no longer needed. A notice says the agency believes that labeling alone is adequate to communicate the risk, and labeling will continue to inform healthcare professionals and patients about the risk.

As of 4/2025, the notice says, the REMS was eliminated for Letaris and generics (ambrisentan), Opsumit and generics (macitentan), Opsynvi (macitentan and tadalafil), and Tryvio (aprocitentan).

FDA says it also notified manufacturers of Traceleer and generics (bosentan) and Filspari (sparsentan) that they must modify the REMS to remove requirements related to EFT risk.

“FDA’s ERA REMS requirements for EFT risk were based on findings from animal studies,” the notice says. “Over time, the agency monitored clinical outcomes in patients exposed to ERA medicines during pregnancy and observed that these data did not show a pattern of congenital malformations consistent with what was observed in animal EFT studies. Given the agency’s new analysis and understanding of clinical risk, FDA determined that labeling for all ERA medicines is sufficient to provide information about EFT risk and its mitigation.”

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