This is the Vancouver style for referencing, used at the Univerity of Portsmouth within the School of Pharmacy and Biomedical Sciences and the Radiography departments.

This guide is modelled on Citing Medicine: The NLM Style Guide for Authors, Editors, and Publishers (2nd edition). You may wish to consult this source directly for additional information or examples.

The Electronic Medicines Compendium (EMC) is a website but you are presumably looking at a particular drug. If you access a Patient Information Leaflet or a Summary of Product Characteristics through EMC, the author is the company who produces the drug, not EMC. The company will be named on the page. There will always be a "last updated" date on the page, which is the date you should give.

Standard Format

Author AA. Title of PIL or Summary of Product Characteristics [Internet]. Place of publication: Publisher; Year of Publication [cited YYYY Mon DD]. Available from: 


Trion Pharma Limited. Altridexamol 1000 mg Effervescent Tablets [Internet]. Cowplain: Trion Pharma Limited; 2020 [cited 2022 Apr 19]. Available from: 

Mylan. Acamprosate 333 mg Gastro-resistant Tablets SmPC [Internet]. Hertfordshire: Mylan; 2020 [cited 2020 Dec 4]. Available from: