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Dupixent was Sanofi’s was the best-selling pharmaceutical product in 2025. Lantus followed with a revenue of 1.7 billion euros. Lantus has been among the company’s top products for many years, but has shown a significant decrease in revenue since the patent expired in 2015.

Diabetes treatment

Diabetes is one of the most prevalent chronic diseases worldwide. Accordingly, antidiabetics form one of the three largest therapy classes within the global pharmaceutical market. Diabetes means that the human body cannot produce its own insulin or use its insulin effectively. While people with type 1 diabetes always need insulin for treatment, type 2 diabetesÌý±è²¹³Ù¾±±ð²Ô³Ù²õ do not necessarily need it. A key medicine for persons with type 2 diabetes is metformin, which helps to control blood sugar and to use insulin effectively. Lifestyle change, a balanced diet, and physical activity might also be important parts of diabetes treatment.

The diabetes market

As mentioned, the diabetes segment is one of the largest single therapy classes within the pharmaceutical market, projected to generate around *** billion U.S. dollars in 2027 worldwide. With projected increasing numbers of people affected worldwide until 2045, the diabetes market is also expected to grow. Currently, French company Sanofi is one of the world’s largest antidiabetics based on revenue.