Sionna Therapeutics topline clinical data for cystic fibrosis programs disappoints, opting to discontinue its SION-719 candidate.

Sionna’s medicine didn’t have a meaningful additive impact when combined with Vertex’s top-selling Trikafta, surprising analysts and collapsing company shares.

A pill from Sionna Therapeutics provided no added benefit when combined with Vertex's cystic fibrosis blockbuster Trikafta, a blow to the biotech.