Cinnamon (Cinnamomum zeylanicum Nees), the evergreen tree of tropical area, a member of family Lauraceae, has been used in day to day routine as a spice and condiment in India. Literature review on cinnamon revealed that it chiefly contains essential oils and all other categories like cinnamic acid, cinnamaldehyde and cinnamate. It has got good antiinflammatory, antioxidant, antiulcer, antimicrobial, anticancer hypoglycemic and hypo lipidemic potential. In clinical reports it was found very safe and useful in allergic conditions also. Current review describes the pharmacological potential of cinnamon in preclinical and clinical scenario.