I’ve no experience of this drug but found this on the Diabetes UK website
What is pioglitazone?
Pioglitazone belongs to a group of drugs called thiazolidinediones, also known as glitazones. It is the only glitazone available in the UK. The brand name for pioglitazone is Actos.
This medication is used to manage blood sugar levels. You can take it on its own or with other diabetes medications such as metformin, sulphonylureas or insulin.
There is another medication that has both pioglitazone and metformin in one tablet, which has the brand name Competact.