Bet it’s more expensive than Invermectin and quinine.
Metformin is a cheap generic. Or just use the herb berberine instead it does basically the same thing.
Glucose-lowering effect of berberine on type 2 diabetes: A systematic review and meta-analysis
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9709280/
It’s dirt cheap.