International drug price comparisons: quality assessment Comparación internacional de precios de medicamentos: evaluación de la calidad

• Main Authors: Márcio Machado, Ryan O'Brodovich, Murray Krahn, Thomas R. Einarson
• Format: Article in Journal/Newspaper
• Language: English; Spanish; Portuguese
• Published: Pan American Health Organization 2011
• Subjects: Medicamentos bajo prescripción; precio de medicamento; comercialización de medicamentos; revisión; Prescription drugs; drug price; pharmaceutical trade; review; Medicine; R; Arctic medicine. Tropical medicine; RC955-962; Public aspects of medicine; RA1-1270; Arctic
• Online Access: https://doaj.org/article/cc5935b018d54dfd963123482546242e

OBJECTIVE: To quantitatively summarize results (i.e., prices and affordability) reported from international drug price comparison studies and assess their methodological quality. METHODS: A systematic search of the most relevant databases-Medline, Embase, International Pharmaceutical Abstracts (IPA), and Scopus, from their inception to May 2009-was conducted to identify original research comparing international drug prices. International drug price information was extracted and recorded from accepted papers. Affordability was reported as drug prices adjusted for income. Study quality was assessed using six criteria: use of similar countries, use of a representative sample of drugs, selection of specific types of prices, identification of drug packaging, different weights on price indices, and the type of currency conversion used. RESULTS: Of the 1 828 studies identified, 21 were included. Only one study adequately addressed all quality issues. A large variation in study quality was observed due to the many methods used to conduct the drug price comparisons, such as different indices, economic parameters, price types, basket of drugs, and more. Thus, the quality of published studies was considered poor. Results varied across studies, but generally, higher income countries had higher drug prices. However, after adjusting drug prices for affordability, higher income countries had more affordable prices than lower income countries. CONCLUSIONS: Differences between drug prices and affordability in different countries were found. Low income countries reported less affordability of drugs, leaving room for potential problems with drug access, and consequently, a negative impact on health. The quality of the literature on this topic needs improvement. OBJETIVO: Resumir cuantitativamente los resultados (p. ej., precios y asequibilidad) presentados en estudios de comparación internacional de precios de medicamentos y evaluar su calidad metodológica. MÉTODOS: Se llevó a cabo una búsqueda sistemática en las bases de datos ...