It breaks all records in the world and panics pharmaceutical laboratories. Here’s why millions of patients are seeking it today.
For years, the best-selling drugs in the world were mainly intended to treat cancer, cholesterol or cardiovascular diseases. But for some time now, a completely different type of treatment has been disrupting the pharmaceutical market. Driven by a global phenomenon around weight loss, this drug is generating unprecedented enthusiasm, both among patients and on social networks. Its success is such that it has even just dethroned the most prescribed treatments on the planet.
As reported by the Les Echos website, since the start of 2026, this treatment has surpassed Keytruda, a drug used against certain cancers. Which is pretty incredible since it’s only been on the market for a few months. Developed by the Eli Lilly laboratory, it has just become the best-selling treatment in the world. A dazzling success for an injection initially intended for people with type 2 diabetes.
This medicine is Mounjaro. If it is so talked about, it is for its impressive effects on weight loss. This treatment acts directly on the appetite: patients feel less hungry, eat less and gradually lose weight. Some studies show losses of up to 30 kilos in some patients. On Instagram or in the media, testimonies are multiplying. Both anonymous people and celebrities report spectacular transformations, helping to make this treatment extremely popular.
Mounjaro has been marketed in France since 2024 and can be prescribed for type 2 diabetes or obesity, under certain medical conditions. It is not yet reimbursed by Social Security in 2026. It is not the only highly coveted weight loss drug. Ozempic and Wegovy, marketed by the Novo Nordisk laboratory, have also enjoyed enormous success throughout the world. This global craze can also be explained by the increase in obesity. According to the World Health Organization, more than a billion people worldwide are obese, or about one in eight people, and these numbers are expected to rise further in the coming years. Obesity is a disease that reduces life expectancy. Pharmaceutical laboratories are therefore investing massively in this new generation of treatments presented as a revolution.
However, doctors point out that these medications are not harmless. They must be taken in a specific medical context and can cause side effects, particularly digestive. Nausea, vomiting or fatigue are among the most common reactions. Specialists also emphasize one point: these treatments do not replace a healthy lifestyle. A balanced diet, sleep and physical activity remain essential to achieve lasting results.
