The present application provides a pharmaceutical formulation comprising a folate receptor (FR)-targeting antineoplastic substance or composition, wherein the pharmaceutical formulation is configured for administration by inhalation, wherein the FR-targeting antineoplastic substance or composition is comprised in a nanoparticle and wherein the nanoparticles are comprised in microparticles, and its use in the treatment of a proliferative disease affecting at least part of the respiratory tract. The present application further provides a pharmaceutical formulation comprising an antineoplastic agent and a FR-targeting excipient, for use in the treatment of a proliferative disease affecting at least part of the respiratory tract.
