The Influence of a Single Therapeutic Dose of Methadone on Selected Auditory Functions in Patients Addicted to Opioids and Undergoing Substitution Therapy – a Preliminary Study

The main purpose of this research was to determine the influence a therapeutic dose an opioid drug (methadone) on selected auditory functions in patients addicted opioids (recognition ICD-10; F11) and undergoing substitution therapy. Various hearing tests were used – pure tone audiometry, impedance otoacoustic emission measurement, speech noise test two sessions, before after methadone intake. It found that causes improvement intelligibility when is presented speech-like noise, slightly decreases thresholds [dB HL]. Methadone consumption has no significant impact distortion product emissions levels (DPOAE). In summary, prescribed does not worsen opioid-dependent subjects.