So, I looked around online and I'm not sure you actually need a prescription if its in the original foil packets and is not some kind of schuldule whatever controlled substance.  From this website 
http://www.hc-sc.gc.ca/dhp-mps/compli-c ... ng.php#a52not sure about other countries!  I think I'm just going to declare it.
5.2.3 Visitors to Canada
Visitors to Canada may bring into Canada, on their person:
A single course of treatment or a 90-day supply based on the directions for use, whichever is less, of a health product.
The health product must be for the individual’s own personal use, for the use of a person for whom they are responsible and with whom they are travelling, or for use on an animal for which they are responsible and with whom they are travelling.
The health product must be shipped/carried in one of the following:
Hospital or pharmacy dispensed packaging;
Original retail packaging; or
have the original label affixed to it which clearly indicates what the health product is and what it contains.
Should a Visitor’s stay in Canada exceeds the supply of medication imported at the time of their arrival to Canada, the Visitor may import an additional single unit, single course of treatment or a 90-day supply based on the directions for use, whichever is less, of a health product. When a health product is mailed to a Visitor, the health product should be accompanied by some form of documentation indicating that the health product is destined to a Visitor and/or the Visitor should be prepared to provide documentation/written evidence (stamped passport, student/work visa, letter from an employer/university etc) that they are a Visitor to Canada when requested.
Visitors are advised that the exporting country may also have additional restrictions on what may be exported to Canada. Visitors are advised to check with their local authorities before leaving and to plan accordingly.
Visitors are responsible for ensuring that any remaining health products they imported into Canada but have not consumed during their stay are either safely disposed of or exported from Canada by them when they leave the country.