The present disclosure relates to methods of treating acquired sensorineural hearing loss and/or ototoxicity in mammals by administering quinoxaline or a pharmaceutically acceptable derivative thereof. In implementations, quinoxaline and its derivatives can decrease cochlear hair cell damage and/or stimulate cochlear hair cell proliferation. In some implementations, quinoxaline can be administered as a pre-treatment prior to, or in conjunction with, exposure to ototoxic pharmaceutical agent(s) and/or acoustic trauma to prevent or decrease cochlear hair cell cytotoxicity and/or stimulate cochlear hair cell proliferation. In other implementations, quinoxaline can be administered as a treatment following exposure to ototoxic pharmaceutical agent(s) and/or acoustic trauma to stimulate cochlear hair cell proliferation.