What is a common use for the medication metformin?

Metformin is primarily used as an oral medication to manage blood sugar levels in individuals with type 2 diabetes. It works by improving the sensitivity of body tissues to insulin, decreasing glucose production in the liver, and promoting the uptake of glucose by cells. This makes it an essential part of treatment for people diagnosed with type 2 diabetes, helping to control their blood sugar levels and reduce the risk of diabetes-related complications.

The other options refer to conditions that metformin does not specifically treat. While hypertension, high cholesterol, and anxiety disorders are common health concerns, they require different types of medications and treatment approaches that do not include metformin. Thus, its use is distinctly associated with the management of type 2 diabetes, making that answer the most appropriate in this context.