PURPOSE: to investigate the adherence to voice therapy guidelines of teachers in municipal schools that were treated at the Voice Clinic of Hospital das Clínicas, Federal University of Minas Gerais, and that were discharged from voice therapy. METHOD: 39 patients treated at the Voice Clinic of Hospital das Clínicas, Federal University of Minas Gerais were interviewed by phone from August 2007 to December 2008. The interviews aimed to analyze the adherence to the guidelines after voice therapy discharge. RESULTS: this study outcome indicates that 34 patients (87.1%) report following the guidelines, four (10.2%) do it partially and one (2.5%) referred not following the guidelines. CONCLUSION: the majority of teachers adhere to the guidelines after voice therapy discharge. The outcome suggests that the voice therapy helps to maintain the standard of voice and a healthy vocal behavior.