The present disclosure relates to: (a) stabilized pharmaceutical dosage forms comprising atrasenstan, or a pharmaceutically acceptable salt thereof, and, optionally, another therapeutic agent; (b) methods of using such pharmaceutical dosage forms to treat nephropathy, chronic kidney disease, and/or other conditions; (c) kits comprising such pharmaceutical dosage forms and, optionally, a second pharmaceutical dosage form comprising another therapeutic agent; (d) methods for the preparation of such pharmaceutical dosage forms; and (e) pharmaceutical dosage forms prepared by such methods.