Background: There are indications of staggered market entry of medicines in the national markets, with medicines being marketed first in countries with high prices. This study aimed to analyse the availability and evolution of medicine prices in the European Union (EU). *** Methods: This research was performed for an illustrative sample of five medicines (abiraterone, emtricitabine/rilpivirine/tenofovir disoproxil, fingolimod, linagliptin and sofosbuvir) in 27 EU Member States. Price data at 6, 12, 18, 36 and 60 months after marketing authorisation were retrieved from national administrative price databases and registers accessible through the Pharma Price Information service. *** Results: In the first year after marketing authorisation, price data for the selected medicines were only available in a small number of EU Member States - usually high-income countries. Availability increased over time. However, some countries, for instance Central and Eastern Europe, had price data available only several years after marketing authorisation. The average European price of the surveyed medicines decreased by at least 7.1% between 6 months and 3 years and at least 9.5% between 6 months and 5 years after marketing authorisation. Price data availability in lower-income countries at later stages, and price decreases in some countries, appear to be major reasons for the reductions in average prices. *** Conclusions: If policymakers aim to apply the pricing policy of external price referencing (i.e. price setting based on prices in other countries) for cost-containment purposes, they are recommended to undertake continuous price revisions over the years.