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Novartis twin drug trial setbacks pile pressure on pipeline, CEO - Finance news and analysis from Global Banking & Finance Review
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Novartis twin drug trial setbacks pile pressure on pipeline, CEO

Published by Global Banking & Finance Review

Posted on September 8, 2026

4 min read

· Last updated: September 8, 2026

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Novartis Faces Increased Scrutiny After Major Drug Trial Setbacks Shake Market

Novartis Drug Trial Failures and Market Impact

By Bhanvi Satija, Dave Graham and Marleen Kaesebier

Del-Desiran Trial Failure and Share Price Reaction

ZURICH, Sept 8 (Reuters) - Novartis said on Tuesday its experimental drug for a muscle-wasting disorder failed a late-stage study, the second major trial setback in days, sending the Swiss drugmaker's shares down about 11% in its worst trading day on record.

The setback for del-desiran, which Novartis acquired through its recent $12 billion acquisition of Avidity, increases pressure on CEO Vas Narasimhan and his M&A strategy to build up the firm's pipeline.

Details of the Failed Study

The drug was being tested in myotonic dystrophy, a muscle-wasting disease with no approved treatments. Novartis said the drug did not meet its main goal of improving video hand opening time (vHOT), a measure of how quickly patients can open their hand after making a fist that gauges muscle stiffness.

Analyst and Investor Reactions

The drug "should have been a 'must win' for the company," said James Eugene, an analyst at Novartis shareholder Verso Investment Management, adding the failure would put more pressure on dealmaking and other drugs in development.

"This recent setback would have dented confidence in its acquisition strategy given the size of the deal and the relatively high expectations of success for del-desiran."

Broader Pipeline Challenges

The trial failure means Novartis has now missed on two of three key tests for its pipeline this year. It also recently halted eight of 10 studies for an experimental cell therapy, rap-cel, after three patients died.

Market Value and Sales Projections

TRIAL DENTS CONFIDENCE IN NOVARTIS PIPELINE

Novartis' shares closed down 10.9% on Tuesday in a record daily fall, wiping about 26 billion Swiss francs ($32 billion) off the company's market value.

Barclays analysts had estimated peak annual sales of $3.1 billion for del-desiran and assigned the drug a 60% chance of success following positive mid-stage data.

Industry and Peer Impact

Shreeram Aradhye, Novartis' president of development and chief medical officer, said developing therapies for diseases such as myotonic dystrophy type 1 remained challenging and that setbacks were part of scientific progress.

The results also weighed on other drug developers in U.S. premarket trading. Shares of Dyne Therapeutics and Sarepta Therapeutics, which are developing treatments for muscular dystrophy, fell 27% and 11%, respectively.

Future Growth Prospects

Investors had been counting on del-desiran, heart drug pelacarsen and anti-inflammatory drug remibrutinib to drive growth as Novartis faces declining sales of older drug Entresto and prepares for patent expiries early in the next decade.

"A lot is riding on remibrutinib, and there is now a greater burden for it to perform," Eugene said. The drug was successful in a multiple sclerosis study and data from another skin disease trial is expected later this year.

Vontobel analyst Stefan Schneider said he was not changing his assessments of the other two therapies Novartis acquired via Avidity, although the latest setback had further weakened confidence in the company and some investors were likely to flee the stock.

Pressure on CEO Vas Narasimhan

Leadership and Strategic Challenges

PRESSURE ON CEO NARASIMHAN

Del-desiran's results come a day after Novartis shares fell more than 3% following the failure of its closely watched trial of a cholesterol drug, pelacarsen, which was also seen as a potential billion-dollar opportunity.

The back-to-back failures add pressure on Narasimhan who has focused on rebuilding Novartis' pipeline after spinning off its generics and consumer businesses while confronting what he has called the company's steepest patent cliff in decades.

Financial Guidance and Analyst Perspectives

Novartis reiterated its full-year guidance and said it continues to expect sales to grow at a compounded annual rate of 5% to 6% between 2025 and 2030. However, analysts said this goal will now be perceived as unattainable due to two consecutive failures.

"Worries over post-2030 growth will now likely re-emerge," Jefferies analyst Michael Leuchten wrote in a note.

($1 = 0.8107 Swiss francs)

(Reporting by Dave Graham, Bhanvi Satija, Marleen Kaesebier and Sriparna Roy; Editing by Ludwig Burger, Mark Potter and Tomasz Janowski)

Key Takeaways

  • Del‑desiran, acquired via Novartis’s ~$12 billion Avidity deal, failed its Phase III HARBOR study in myotonic dystrophy, missing improvement on video hand opening time (currently.att.yahoo.com).
  • Novartis’s shares tumbled approximately 9%–11%—a record one‑day drop—erasing around CHF 24 billion (roughly $30 billion) in market value (ksl.com).
  • The del‑desiran setback compounds a recent failure of the cholesterol drug pelacarsen (Lp(a)HORIZON Phase III), underscoring doubts over Novartis’s acquisition‑led pipeline rebuild strategy (ir.ionispharma.com).

References

Frequently Asked Questions

What recent drug trial setbacks has Novartis experienced?
Novartis faced two major trial setbacks: its experimental drug del-desiran failed a late-stage study for myotonic dystrophy, and its cholesterol drug pelacarsen also failed a closely watched trial.
How have these setbacks affected Novartis' share price?
Novartis shares dropped about 11% in their worst trading day on record, wiping around 26 billion Swiss francs ($32 billion) off its market value.
What is the impact on Novartis’ acquisition strategy?
The failure of del-desiran, acquired through a $12 billion deal with Avidity, has shaken investor confidence in Novartis’ M&A strategy and its drug pipeline.
How do these trial results impact investor confidence?
Consecutive failures have undermined confidence in Novartis' ability to deliver on its drug pipeline and raised doubts about its growth forecasts.
What diseases were Novartis’ failed drugs aiming to treat?
Del-desiran was being tested for myotonic dystrophy, a muscle-wasting disorder, and pelacarsen was targeted at lowering cholesterol.

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