Novartis AGDel-desiran failed its late-stage trial in myotonic dystrophy type 1, days after pelacarsen also failed a major late-stage study, hitting Novartis' pipeline.

Novartis AG suffered a major setback after its experimental drug del-desiran failed a late-stage trial for myotonic dystrophy type 1, a rare muscle-wasting disease with no approved treatments, missing statistical significance over placebo on the primary endpoint of video hand opening time. The failure came just days after Novartis' cholesterol drug pelacarsen also failed a major late-stage study, and del-desiran was one of the key assets acquired through Novartis' $12 billion acquisition of Avidity Biosciences, where Barclays analysts had estimated peak annual sales of about $3.1 billion and assigned it a 60% probability of success. The two failures increase pressure on CEO Vas Narasimhan as Novartis seeks to replace revenue from established medicines such as Entresto ahead of future patent expirations, though the company reaffirmed its target of 5%-6% annual sales growth through 2030. Attention now falls on remibrutinib, which recently succeeded in a late-stage multiple-sclerosis study, with additional data in another indication expected later this year and analysts seeing it as potentially capable of generating billions of dollars in peak annual sales. Novartis is evaluating the full del-desiran dataset and plans to engage with regulators, leaving some possibility the program could have a future depending on the underlying data and trial interpretation.
Novartis AGDel-desiran failed its late-stage trial in myotonic dystrophy type 1, days after pelacarsen also failed a major late-stage study, hitting Novartis' pipeline.
Barclays PLC
Rio Tinto PLCDel-desiran, a key asset from Novartis' $12 billion acquisition of Avidity Biosciences, failed its late-stage trial.