Treatment Satisfaction Questionnaire for Medication (TSQM version 1.4): Ceiling and Floor Effects, Reliability, and Known-Group Validity in Brazilian Outpatients With Hypertension.

•The Treatment Satisfaction Questionnaire for Medication (TSQM) version 1.4 is a questionnaire used to measure patient satisfaction with medication, and it was proved to be a valid and reliable tool in several languages.•This article shows that the TSQM can discriminate satisfaction in different levels of disease severity, medication adherence, and side effects in a diverse population with a low scholarly level.•The TSQM is a reliable and valid tool to be used in the Brazilian population that also can help providers in identifying if their patients are satisfied with the medication treatment and look for possible reasons for nonadherence to treatment.