ABSTRACT:Hydrazones are present in many of the bioactive heterocyclic compounds that are of wide interest because of their diverse biological and clinical applications. This created interest in researchers who have synthesized variety of hydrazone derivatives and screened them for their various biological activities viz. anticonvulsant, antidepressant, analgesic, anti-inflammatory, antiplatelet, antimalarial, antimicrobial, antimycobacterial, anticancer, vasodialator, antiviral, antischistosomiasis, anti-HIV, anthelmintic, antidiabetic and trypanocidal activities. Hydrazones possessing an azometine -NHN=CH-proton constitute an important class of compounds as target structures and evaluated their biological activities. These observations have been guiding for the development of new hydrazones that possess varied biological activities.