二甲双胍是一种广泛用于治疗2型糖尿病的口服降糖药，已有60多年临床使用历史。它通过抑制肝脏葡萄糖生成、提高胰岛素敏感性等方式降低血糖，且低血糖风险较低，价格低廉，因此被全球多个指南推荐为一线用药。近年来，有研究指出二甲双胍可能具有抗衰老、抗癌、心血管保护甚至延缓认知衰退等“额外益处”，引发公众对其是否为“神药”的热议。然而，这些潜在作用大多基于动物实验或观察性研究，尚缺乏大规模、高质量的随机对照试验证实。医学界普遍认为，二甲双胍虽疗效确切、安全性良好，但并非万能药。其使用仍需在医生指导下进行，尤其对肾功能不全者需谨慎。因此，称其为“神药”更多是对其综合价值的赞誉，而非科学定论。理性看待其疗效与局限，才是合理用药的关键。
Metformin is a widely used oral medication for treating type 2 diabetes, with over 60 years of clinical use. It lowers blood glucose primarily by reducing liver glucose production and improving insulin sensitivity, carries a low risk of hypoglycemia, and is cost-effective—making it a first-line therapy recommended by global guidelines. Recently, studies have suggested metformin may offer additional benefits beyond glycemic control, such as anti-aging effects, cancer prevention, cardiovascular protection, and even delayed cognitive decline, sparking public debate over whether it qualifies as a ‘wonder drug.’ However, most of these potential benefits are based on animal studies or observational data, lacking confirmation from large-scale, high-quality randomized controlled trials. The medical community generally agrees that while metformin is effective and safe, it is not a panacea. Its use should always be guided by a healthcare professional, especially in patients with impaired kidney function. Thus, calling it a ‘wonder drug’ reflects admiration for its broad therapeutic value rather than scientific consensus. A balanced understanding of its proven benefits and limitations remains essential for appropriate use.
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