Muscle Adverse Events Among Users of Simvastatin in Primary Health Care: Collaborative Drug Therapy Management

Abstract

Collaborative drug therapy management in primary health care involves communication among the physician, pharmacist and user of simvastatin and can result in safer results regarding patient wellbeing. The aim of the study was to investigate muscle adverse events and risk factors related to simvastatin. For patients who developed muscle adverse events, collaborative drug therapy management was performed in an attempt to resolve the symptoms. A non-randomized case study was conducted at the single basic health unit in the city of Peabiru, Parana, Brazil, for a period of one year. Patients were interviewed using a structured form. To confirm muscle adverse events, the patient was referred to a physician and submitted to the suspension and return to treatment. Thyroid-stimulating hormone, creatine kinase and alanine aminotransferase exams were performed. A sample of 148 users of simvastatin was selected. Eleven patients had some type of simvastatinassociated muscle adverse event (myopathy), among whom seven had muscle symptoms (myalgia) and four had elevated creatine kinase, but were asymptomatic (asymptomatic myopathy). Collaborative drug therapy management focused on simvastatin for five patients with myalgia led to improvements in the quality of life of two patients. EVENTOS ADVERSOS MUSCULARES ENTRE USUÁRIOS