In order to establish the therapeutic uses of holy basil in modern medicine, in the last few decades several Indian scientists and researchers have studied the pharmacological effects of steam distilled, petroleum ether and benzene extracts of various parts of this plant and eugenol on the immune system, reproductive system, central nervous system, cardiovascular system, gastric system, urinary system and blood biochemistry and have described the therapeutic significance of holy basil in the management of various ailments.These pharmacological studies have established a scientific basis for therapeutic uses of holy basil(Prakash and Gupta, 2005).