The present disclosure provides compositions comprising antimicrobial agent and excipient, wherein the composition is devoid of fatty acids or their esters having more than 10 carbons. The present disclosure also provides compositions comprising antimicrobial agent and excipient, wherein the composition has at least one fatty acid/ester with carbon chain smaller than C11, and wherein the composition is devoid of fatty acids or their esters having more than 10 carbons. In an embodiment of the present disclosure, the compositions are a nanocomposite wherein particle size of at least one component is in nanoscale range. Further, the present disclosure also relates to formulating said compositions in a manner wherein, particle size or globule size of the formulation is in nanoscale range. The present disclosure also provides process for obtaining said compositions or formulations along with methods for treating microbial infections by using the compositions or the formulations of the present disclosure.
