Since the Citing Medicine guide is an American publication, it does not provide detail on citing Canadian legal documents.
The Canadian Guide to Uniform Legal Citation (aka the McGill Guide) is the preferred resource across citation formats for legal references in Canada. Some example citations based on the McGill Guide are available on this Guide to Canadian Legal Citation.
Citing Medicine by the NLM provides the most thorough directions on how to cite according to Vancouver style.
To reference the entire CPS, use the citation formatting below:
CPS [Internet]. Ottawa (ON): Canadian Pharmacists Association; c2022 [cited YYYY MMM DD]. Available from: http://www.e-therapeutics.ca. Also available in paper copy from the publisher.
To reference part of CPS, such as a product monograph (where Gleevec is provided as an example of a product monograph), use the citation formatting below:
CPS [Internet]. Ottawa (ON): Canadian Pharmacists Association; c2022 [updated YYYY MMM DD; cited YYYY MMM DD]. Gleevec [product monograph]. Available from: http://www.e-therapeutics.ca. Also available in paper copy from the publisher.
The information above was taken directly from the CPhA's FAQ page for CPS.This page also provides sample citations for referencing therapeutic content from the database.