A herb used mainly to detoxify the body due to its rich source of iridin. It increases urination and bile production and has a mild laxative effect.

The Blue Flag root is also effective as a topical medicine; it can reduce inflammation of the skin and may decrease the symptoms of skin infections. It is also great in treating burns, bruises and wounds. It was used in traditional Indian medicine to treat obesity and in one study was shown to reduce food intake in rats; however it is toxic, irritant and emetic in very large doses.