This medication is treatment for Type 2 Diabetes, it lowers blood glucose levels by excreting it through the kidneys. People with diabetes have a higher risk of heart failure (that is the heart not as strong as it otherwise would be) and kidney failure/disease too (kidneys not functioning as well as should do).
Diabetes has always caused these problems, along with other problems, if not well controlled, so this medication is a good thing. A yearly review is ideal to check kidney function, along with usual diabetes management. The patient information leaflet is full of good advice.
Americans and drug/medicine use/reviews/advertising is a total anathema to us here in the UK. I have a US friend, who says that there are constant ads on TV for all and any medicines to treat anything and everything; and then you try to persuade your doctor to give it to you, and then if your insurance will say if your policy will pay for it!!!!!
Here in the UK, the ads on TV will be for paracetamol, brufen - various manufacturers, and all contain the same active compounds; vitamins, again various companies etc, etc.
We leave it to the GP/Hospital consultant to prescribe actual treatments, and hope that they are aware of the latest guidelines, and latest evidence based practice.
Sometimes we ask in online fora for advice about medicines we have been prescribed!!!!!