The present invention relates to a nanoparticulate formulation comprising a transient receptor potential ankyrin-1 receptor ("TRPA1") antagonist. Particularly, the present invention relates to a nanoparticulate formulation comprising a thienopyrimidinedione derivative as a TRPA1 antagonist and a surface stabilizer; a process for preparing such formulation; and its use in treating a respiratory disorder or pain in a subject.