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Zealand Pharma slides as concerns over patients quitting survodutide trials resurface

By Thomson Reuters Oct 1, 2026 | 6:17 AM

Oct 1 (Reuters) – Nearly one in five patients quit Zealand Pharma’s late-stage survodutide trial due to gastrointestinal ​side effects caused by the ‌obesity drug, data released on Thursday showed, again raising investor concerns over the high dropout rates.

The Danish drugmaker’s shares slid as ‌much ​as 13%, mirroring the ⁠trend seen in ⁠June when data from other late-stage studies on the survodutide injections, developed with partner Boehringer Ingelheim, showed a quarter of patients ​had left due to side effects, sending the shares up to ⁠25% lower during ⁠the day.

• Analysts said the ​high dropout rate was a key concern, ​with 18% of patients quitting treatment ‌due to side effects

• Patients usually dropped out while doses were being increased, as the trial gave doctors ⁠limited flexibility to adjust dosing when side effects emerged

• Survodutide reduced average blood sugar by ⁠up to ‌1.21 percentage points from ⁠a baseline of 7.4%, while ​improving ‌waist circumference and insulin sensitivity

• ​Zealand Pharma ⁠shares were at the bottom of Europe’s benchmark STOXX 600 index as of 1105 GMT

(Reporting by Vera Dvorakova and Jesus Calero in Gdansk; Editing by ​Milla Nissi-Prussak)