What was the increase in Mounjaro adverse reactions in the UK in 2025?

In 2025, there was a 300% increase in adverse reactions linked to Mounjaro in the UK, with 71 deaths recorded.

What were the most common side effects reported for Mounjaro in 2025?

The most commonly reported reaction in 2025 was 'gastrointestinal disorders', with 37,546 reports.

What does Eli Lilly and Company say about Mounjaro safety?

Eli Lilly and Company states that patient safety is their top priority and they take safety reports seriously, actively monitoring all information for their medicines.

Home / Health / Mounjaro Deaths Surge 300% in One Year

Mounjaro Deaths Surge 300% in One Year

3 Feb

•

Summary

Adverse reactions to Mounjaro saw a 300% increase in 2025.
71 deaths were recorded in the UK linked to the drug in 2025.
Gastrointestinal issues were the most common reported reaction.

In 2025, the UK experienced a dramatic surge in adverse reactions associated with Mounjaro, with reports indicating a 300% increase and 71 deaths. Data from the MHRA's Yellow Card Scheme revealed 40,245 reactions, including 6,755 classified as serious. This represents a substantial jump from 2024, which saw 9,153 reactions and 13 fatalities.

Gastrointestinal disorders were the most commonly reported adverse effects in 2025, accounting for 37,546 reports, 19 of which were fatal. Patients like Karen Coe shared harrowing experiences, describing intense pain and severe symptoms after just one injection.

The manufacturer, Eli Lilly and Company, stated that patient safety is a top priority and that they actively monitor all safety information. Regulatory agencies assess the benefits and risks of new medicines, and patients are encouraged to report any side effects. Recent updates to product information for Mounjaro, Ozempic, and Wegovy now include a warning about a small risk of severe acute pancreatitis.