Monitored medicines:

Since 1 September, a black inverted triangle has started to appear in the product information of medicines that are being monitored particularly closely by regulatory authorities. With this measure, the European Commission aims to improve the safety of medicines and also to highlight to patients, the importance of reporting suspected side effects to the medicines they are taking. 

For more information: 

http://www.ema.europa.eu/ema/index.jsp?curl=pages/special_topics/document_listing/document_listing_000365.jsp