Analysis of Financial Losses due to Poor Adherence of Patients with Chronic Diseases and Their Impact on Health Economics

Pharmaceutical drugs--prescription drugs, not over-the-counter drugs--have prices that are negotiated between pharmaceutical companies and National Ministry of Health or national agency for medicines or national health insurers in every country. Prescription drug expenditures have increased every country's healthcare costs. Medication adherence (defined as not obtained refills of prescriptions or suboptimal dosing of prescribed drugs) is a growing concern to physicians and healthcare systems because of the multiple evidence of noncompliance among patients and correlated adverse outcomes. A patient is considered adherent if he/she takes 80% of his/her prescribed medicine(s). Different studies showed that patients do not take their prescribed medicines about half the time. Financial losses due to poor adherence are the result of unnecessary time-consuming work and costs for potential harm to patients. Hospitalization rates are reduced at higher levels of medication adherence. There are two types of financial losses due to poor treatment adherence: medical costs (measured by hospitalization risk) and drugs costs (without patient copayments). This financial loss analysis underlines the promotion of medication adherence by the patients.