The clearing nuts of India are the product of a tree which is described as larger than that of the nux vomica. It is without thorns or tendrils; leaves very shortly petioled, elliptic, acute, glabrous, membranaceous, five- and almost penninerved; corymbs axillary, opposite, shorter than the leaf; corolla hirsute within; berry one-seeded; flowers greenish-yellow, fragrant. It is found on the Coromandel coast, the Concans and the western Ghauts, flowering in April.
The seeds of kataka are put in water which contains dirt. The seeds will settle the dirt to the bottom of the vessel thereby giving a clear supernatant surface.
The seeds of Strychnos potatorum are rubbed in a clean stone and the paste is applied as collyrium (Anjana) to treat various eye diseases.
The powder of the seed is mixed with appropriate quantity of honey and applied over wound for better healing of it.
The paste of the root of Strychnos potatorum is applied over the skin area affected with eczema.
The powder of kataka seeds is given in a dose of 3-4 g to treat indigestion and diarrhea.