Cyclosporin A  is used as an immunosuppressive agent in organ-transplant patients, is produced by the fungus Trichoderma polysporum.

 Statins produced by the yeast Monascus purpureus have been commercialised as blood-cholesterol lowering agents. 

Yeast (Saccharomyces cerevisiae) is used for commercial production of ethanol.

Penicillium chrysogenum (also known as Penicillium notatum) is the source for penicillin, the first antibiotic.