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Novartis announces trial setback on del-desiran drug

By Thomson Reuters Sep 8, 2026 | 1:05 AM

ZURICH, Sept 8 (Reuters) – Swiss drugmaker Novartis on Tuesday said a late-stage study assessing drug del-desiran’s ​impact on myotonic dystrophy, a form ‌of muscle wasting, had not met its target on a key metric, but reaffirmed its sales guidance through 2030.

Novartis ‌said ​in a statement that ⁠the Phase III ⁠HARBOR study “did not demonstrate statistically significant improvement versus placebo on the primary endpoint of video hand opening ​time”, a measure of hand myotonia.

Shreeram Aradhye, President of Development ⁠and Chief Medical Officer ⁠at Novartis, said that ​developing therapies for a disease like myotonic ​dystrophy type 1 remains challenging, and ‌that setbacks are part of scientific progress.

The company’s announcement came a day after shares in Novartis ⁠fell by more than 3% on news that its cholesterol drug failed in a ⁠closely ‌watched study, dealing a blow ⁠to what investors had ​seen ‌as a blockbuster treatment.

Novartis said ​it was ⁠sticking to its guidance that sales would grow at a compound annual rate of 5-6% from 2025 to 2030.

(Writing by Dave GrahamEditing by ​Ludwig Burger)