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Vertex Stock Rockets On Sionna Therapeutics’ Surprise Cystic Fibrosis Flop
Vertex stock surged Monday after its competitor, Sionna Therapeutics (SION), missed the mark for its highly anticipated cystic fibrosis treatment. Sionna’s drug, SION-719, lowered sweat chloride by 1 millimole per liter, on average and compared to a placebo, when added to Vertex Pharmaceuticals’ (VRTX) Trikafta. Measuring chloride, or salt, in sweat is the gold standard for diagnosing cystic fibrosis, a…
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