In accordance with EU pharmacovigilance legislation, patients have the opportunity not only to report any side effects of medicines, but also on any medication errors they experience.
If you are a patient or healthcare professional, check out a new web page developed by the European Medicines Agency (EMA) with information related to prevention of errors in specific medicines: http://www.ema.europa.eu/ema/index.jsp?curl=pages/special_topics/general/general_content_000570.jsp
In addition to this resource the EMA has published a Good Practice Guide on medication errors to improve their reporting, evaluation and prevention by regulatory authorities and the industry.
You can download the good practice guide http://www.ema.europa.eu/docs/en_GB/document_library/Regulatory_and_procedural_guideline/2015/11/WC500196979.pdfhere