“…But our findings are in accordance with the similar studies conducted and reported on the incidence of hearing loss after aminoglycoside treatment range from 0% (Powell, Thompson, & Luthe, 1983) to 63% (Tablan, Reyes, Rintelmann, & Lerner). 15,16 In our study Incidence HFL is higher 58% (n=11, out of Nineteen patients) and also developed first than LFL, well supported by Dreschler, et al, and Fausti et al, that Aminoglycosides have been known to affect hearing exclusively or initially in higher frequencies (9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) prior to presentation of hearing loss in lower frequencies. 17,18 Ototoxicity is determined by comparing baseline data, ideally obtained prior to ototoxic drug administration, to the results of subsequent monitoring tests.…”