Linked from
The 19 pages that link to Metformin, each with the reason it gives.
Type 2 diabetesRelated: It is a widely used initial medication when drug treatment is indicated.
Diabetes mellitusRelated: It is a widely used medication for type 2 diabetes.
GluconeogenesisRelated: Its glucose-lowering action includes suppression of hepatic gluconeogenesis.
Vitamin B12 deficiencyRelated: Long-term use is associated with reduced B12 levels in some people.