Purpose Several studies have shown socioeconomic inequalities in psychotropic medication use, but most of these studies are inspired by Andersen's behavioural model of health care use, which strongly focusses on individuals' needs. Andersen's model pays little attention to health care use that is not based on need and insubstantially recognises the context dependentness of individuals. Medicalisation, however, is a context-dependent interactive process that not only interacts with need determinants, but also with non-need determinants that affect health care use. Therefore, this study will examine if psychotropic medication use is stratified, and whether this is not simply the result of differences in need for care, but also influenced by factors not based on need, initiating the stratified medicalisation of mental health symptoms. Methods Data from the Belgian Health Interview Survey (BHIS) are used. This study covers information from five successive waves: 2001, 2004, 2013, 2018. The weighted data represent a sample of the adult Belgian population. The research aims are analysed using stepwise Poisson regression models, where the models are also plotted to detect evolutions over time, using marginal means postestimation. Results The results reveal that educational inequalities in psychotropic medication use are significant and persistently visible over time. Even after entering need for care, educational inequalities remain significant. Conclusion This study shows that psychotropic medication use is stratified and that this is not simply the result of differences in need for care, but also influenced by factors linked to the stratified medicalisation of mental health symptoms.