PROBLEM TO BE SOLVED : To provide topical compositions or formulations having antimicrobial agents and being devoid of microbial nutrients. SOLUTION : The present disclosure provides compositions comprising antimicrobial agent and excipient, wherein the composition has at least one fatty acid or its ester with a carbon chain comprising 11 or less carbons, and is devoid of fatty acids or their esters having 10 or more carbons. The compositions are a nanocomposite wherein particle size of at least one component is in nanoscale range. The present disclosure also relates to formulating the compositions in a manner wherein particle size or globule size of the formulation is in nanoscale range. EFFECT : The compositions or formulations can be used for treating microbial infections. SELECTED DRAWING : None COPYRIGHT : (C)2019, JPO&INPIT