[Adherence to essential medicines in cities from three Brazilian states].

This study compared the Municipal Essential Medicines Lists (REMUME) and examined adherence by prescribers and availability of essential medicines in the health units affiliated with the Unified National Health System (SUS). Data were collected on lists and medicines prescribed to 2,411 patients enrolled consecutively in primary or secondary care services in Brazilian municipalities. Of 5,222 prescribed medicines, 76.4% were present on the REMUME, 76.8% on the National List of Essential Medicines (RENAME), and 63% on the World Health Organization (WHO) list. Among the most frequently prescribed medications, one or more did not belong to the respective REMUME. Of all medicines prescribed, 76.1% were available in the inspected facilities; for essential medicines, the availability increased to 88.1%. Prescription in disagreement with the REMUME may result from the unavailability of medicines in the inspected facilities or the lists' inadequacy for the level of care.