Highlights Herbal medicinal product use was 3.8%, with high formal prescription; however, it is accompanied by a high risk of interactions and redundancy. Unified Health System pharmacies are not the main source of herbal medicinal products, suggesting low service implementation. Women, people with mental disorders, and allopathy simultaneously users should receive attention. Non-white people are less likely to use herbal medicinal product, suggesting inequalities in accessing these treatments. ABSTRACT Objective: To determine the prevalence and factors associated with herbal medicinal […]