Improvement of Tinnitus After Oral Zinc on Patients With Noise-induced Hearing Loss

Zinc Deficiency Clinical Trial

Official title: Evaluation of the Effects of Zinc in the Management on Tinnitus Patients With Noise Induced Hearing Loss

Status Completed

Clinical Trial Summary

Twenty patients with tinnitus and a typical noise-induced hearing loss (NIHL) audiogram were included. Each subject underwent an otoscopic examination, distortion product otoacoustic emissions, tinnitus-match testing, Tinnitus Handicap Inventory (THI) and serum zinc level analyses. After 2 months of treatment with zinc, all tests were repeated.

Clinical Trial Description

This study enrolled patients who visited our out-patient department with the primary complaint of tinnitus. A full medical history assessment was performed, and each patient underwent an otoscopic examination, a basic audiologic evaluation. We selected the patients whose audiogram data met the inclusion criteria for NIHL: 1) bilateral typical NIHL audiogram and type A tympanogram; 2) hearing threshold above 4 kilohertz (kHz) was greater than 25 dB hearing level (HL); 3) audiogram showed the characteristic 4 kHz or 6 kHz notch (average hearing threshold was 10 dB HL higher than the baseline); 4) up-turn phenomenon appeared above 6 kHz or 8 kHz, and 5) symmetrical hearing loss threshold over bilateral ears and the disparity was less than 10 dB HL. Patients with other otologic diseases were excluded.

A full medical history assessment was performed, and each patient completed the NIHL questionnaire (Supplementary S1), audiogram, tympanogram, speech discrimination test, distortion product otoacoustic emissions (DPOAE) testing, pitch and loudness match of the tinnitus, Tinnitus Handicap Inventory (THI) and serum zinc level analyses. All tests were repeated after 2 months of treatment with zinc gluconate (Zinga 78 mg, 10 mg elemental zinc), two tablets twice per day (40 mg per day). ;

Study Design

Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment

Related Conditions & MeSH terms

• Deafness
• Hearing Loss
• Hearing Loss, Noise-Induced
• Tinnitus
• Tinnitus, Noise Induced
• Zinc Deficiency

• NCT number: NCT02951715
• Study type: Interventional
• Source: Chang Gung Memorial Hospital
• Status: Completed
• Phase: N/A
• Start date: December 2013
• Completion date: December 2014