According to Sri Lankan native treatment, the leaves are used as a cure for fever, sinus, and respiratory problems. It acts as a coolant and a worm-killer. The leaves are rich in Vitamin E and have the properties to kill germs, bacteria, and clear poison. The Kathurumurunga leaves can be made into a delicious tea which has antibiotic properties.
The juice of the leaves is used for the treatment of nausea, gout, and itchiness and leprosy. The crushed leaves of the tree are also used for the treatment of sprains and bruises. It is also considered as native treatment for epileptic fits. The leaves of the Kathurumurunga are also used as fodder for livestock, and also as green manure. The leaves used as an energy-booster and a laxative. It is also a disinfectant for the mouth and throat. Regular intake of Kathurumurunga leaves helps in the prevention of weak bones and arthritis. Constipation and burning sensation in the body can be controlled by taking these leaves. Kathurumurunga leaves are boiled and given to mothers of new-born babies for healthy breast feeding. It is often recommended for indigestion and other digestion related problems. It is also known to restore the equilibrium of the mind.
The flowers of Sesbania grandiflora are large (7-9 cm long); however, the two varieties of Kathurumurunga flowers are unquestionably different. Grandiflora variety has white flowers and the coccinea variety has rose pink or red flowers. The standard petals in both varieties are usually upright and curved down and away from the flower.
In Sri Lanka, the flowers (white) make a tasty snack when dipped in batter and fried. The flowers are mixed into curries, tempered in oil or used in salads and soups. They are rich in calcium, iron as well as Vitamins A and B.
The flowers are used as a key ingredient in anti-ageing skin care products because it is rich in tannins and nutrients that re-activate the skin's ability to heal wrinkles while increasing collagen production. Sesbania grandiflora flowers are known to have been used in Sri Lankan traditional medicine to cure headaches and stuffy noses.
A few drops of the juice made from the Sesbania grandiflora flower are put into the eyes to eliminate dullness in vision.