Assessment of patients' awareness on drugs use and adherence to drug therapy as an element of Medication Review service

The administration of an excessive amount of or unnecessary drugs is a prerequisite for numerous drug-related problems, non-compliance, non-adherence to medicinal therapy, exacerbation and poor control of chronic diseases, and failure in achieving the treatment goals. The aim of this study was to assess patients' awareness on drug use (administration, adherence to drug therapy) and to identify the possible drug-related problems with patients, using 5 or more medicines on Bulgarian territory. The data were collected implementing a structured study tool – a questionnaire for assessment of patients' therapy using 5 or more drugs prescribed by a physician, including OTC and/or food supplements. The study provided an identification of factors affecting skipping of doses, modification of regime and analyzed the relationships and interdependencies between number of diagnoses and adverse drug effects rate; number of administered drugs and reported problems and unawareness of the medicinal product indications and health state. The results showed that it was necessary to introduce the Medication Review (MR) service in Bulgarian pharmaceutical practice. That will provide possibilities for development of pharmacists' role in dispensing medical products, it will help in reducing drug-related problems and increasing the effectiveness of the treatment and adherence to medical therapy