Diethylcarbamazine Tablet is primarily used to treat parasitic infections such as filariasis and loiasis, not for cough. However, in certain cases where a cough is caused by parasitic infections, Diethylcarbamazine can help by eliminating the parasites responsible for the symptoms. It is not a standard treatment for cough caused by viral or bacterial infections. Always consult a healthcare provider for appropriate diagnosis and treatment of a cough.