Is this century-old diabetes medication the most versatile drug in modern medicine?

Health · Published 29 September 2026 · Updated 25 October 2026 Swipe more like this →

In short: Originally identified in the 1920s, metformin has evolved from a standard treatment for type 2 diabetes into a global pharmaceutical powerhouse. Beyond managing blood sugar, researchers are now investigating its potential to treat conditions ranging from ovarian syndrome to cancer, sparking intense interest in its broader biological mechanisms.

Metformin is a biguanide agent that functions by limiting glucose production in the liver and boosting insulin sensitivity in body tissues. It also increases the secretion of GDF15, a protein that helps regulate appetite and caloric intake. Because it does not typically cause weight gain and carries a lower risk of low blood sugar compared to other diabetes drugs, it is widely considered a first-line treatment for type 2 diabetes. Its clinical history is long, with the first scientific descriptions appearing in 1922, followed by human studies in the 1950s and its formal introduction in France in 1957.

The drug's reach extends far beyond diabetes. It is frequently used to manage symptoms of polyendocrine metabolic ovarian syndrome (PMOS), where it can assist with infertility and metabolic abnormalities. Because it is inexpensive and widely available as a generic, it has become one of the most prescribed medications in the world, with over 85 million prescriptions issued in the United States in 2023 alone.

Current research is exploring whether metformin’s anti-inflammatory properties can be repurposed for other serious conditions. Preclinical studies in mice have suggested it might attenuate behavioral deficits associated with autism spectrum disorder, while laboratory research on ovarian cancer cells indicates that the drug can suppress metastatic potential and increase sensitivity to chemotherapy. While these findings are promising, they remain largely experimental, highlighting the distinction between the drug's established role in metabolic health and its potential future as a multi-purpose therapeutic tool.

Despite its utility, metformin is not without risks. Common side effects like nausea and diarrhea usually subside after a few weeks, but serious complications such as lactic acidosis can occur, particularly in patients with kidney issues. Because of these risks, medical professionals emphasize that it is not suitable for everyone, and patients must be monitored closely to ensure the treatment remains safe and effective.

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