Calamus does in fact have stimulating and warming properties that can have a useful therapeutic effect. Its main application has been in the treatment of stomach complaints and as a detoxifying tonic that rids the body of waste materials. It is strongly diuretic and can be used in cases of oedema.

Calamus is also reputed to be a powerful nervous system tonic and as a useful herb for the mind and memory. In Tibetan medicine incense containing Calamus root is used therapeutically as a nerve tonic.

Externally, a decoction of Calamus can be added to the bathwater as a stimulating, warming additive, e.g. in inflammatory or scrofulous skin conditions, chilblains and the like and is also said to strengthen feeble children.