Metformin Hydrochloride 250mg is the lowest standard dose of the world's most prescribed type 2 diabetes medication. It works by reducing glucose production in the liver, improving insulin sensitivity, and slowing intestinal glucose absorption. The 250mg dose is commonly used as a starting point to minimize gastrointestinal side effects before titrating upward. Benefits include blood sugar control, modest weight-neutral or weight-reducing effects, cardiovascular protection, and off-label use in PCOS and prediabetes. Common side effects include nausea, diarrhea, and the critically underreported risk of vitamin B12 deficiency with long-term use.

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