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Sanofi's Teizeild Gets EU Approval for Treating Type 1 Diabetes

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Key Takeaways

  • Sanofi secured European Commission approval for Teizeild to delay progression to stage 3 T1D disease.
  • SNY-backed TN-10 phase II study showed median progression delayed to 48.4 months vs. 24.4 months with placebo.
  • Teizeild became the first disease-modifying type 1 diabetes therapy authorized in the EU following the nod.

Sanofi (SNY - Free Report) announced that the European Commission has approved Teizeild (teplizumab) to delay the onset of stage 3 type 1 diabetes (T1D) in patients aged eight years and older with stage 2 disease. The approval was expected as the Committee for Medicinal Products for Human Use of the European Medicines Agency had issued a positive opinion in November recommending the approval of Teizeild.

With this approval, Teizeild becomes the first T1D disease-modifying drug authorized in the European Union.

The drug is already approved in the United States and several other countries for delaying the onset of stage 3 T1D in adults and children aged eight years and older with stage 2 T1D. Sanofi markets the drug under the brand name of “Tzield” outside the European Union.

In the past year, SNY’s shares have declined 1.7% against the industry’s 21.9% rise.

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SNY’s Teizeild Approval Based on TN-10 Phase II Study

The European Commission’s approval is supported by positive data from the TN-10 phase II study, which included 76 participants aged eight to 45 years with stage 2 T1D. Participants were randomly given either Teizeild or a placebo for 14 days.

The study met its primary endpoint by demonstrating significant delays in progression from stage 2 T1D to stage 3 T1D. The median time to progression to stage 3 diabetes was 48.4 months in the Teizeild arm versus 24.4 months in the placebo arm. Moreover, 57% of patients treated with Teizeild remained in stage 2 compared with 28% in the placebo group, with fewer adverse events reported.

Teizeild was added to Sanofi’s portfolio in 2023, following its $2.9 billion acquisition of Provention Bio. The drug was originally developed by MacroGenics (MGNX - Free Report) . Provention Bio acquired this drug from MacroGenics under an asset purchase agreement signed in 2018.

Earlier this month, the FDA granted priority review to a regulatory filing seeking approval to expand Tzield’s use in the United States for individuals aged one year and older with stage 2 disease. The final decision is expected by April 29, 2026.

Tzield recorded global product sales of €47 million in the first nine months of 2025, up 33.3% at constant exchange rates, with €44 million coming from the United States.

Sanofi’s Zacks Rank & Stocks to Consider

SNY currently carries a Zacks Rank #3 (Hold).

Some better-ranked stocks in the biotech sector are Amicus Therapeutics (FOLD - Free Report) and Indivior (INDV - Free Report) , currently sporting a Zacks Rank #1 (Strong Buy) each. You can see the complete list of today’s Zacks #1 Rank stocks here.

Over the past 60 days, estimates for Amicus Therapeutics’ 2026 earnings per share have declined from 67 cents to 65 cents. Shares of FOLD have increased 55% over the past year.

Amicus Therapeutics’ earnings beat estimates in one quarter and missed in the remaining three trailing quarters, with the negative average surprise being 20.21%.

Over the past 60 days, estimates for Indivior’s 2026 earnings per share have risen to $2.85 from $2.60. Indivior stock has rallied 208.3% over the past year.

Indivior’s earnings beat estimates in three of the trailing four quarters and were in line in the remaining quarter, with the average surprise being 68%.


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