Not sure about Quebec, but in Ontario when I needed some med's (while on a TRV) I went to a walk in clinic, paid the fee to see the doctor, took the prescription he gave me and paid for the med's at the local shoppers drug mart.
No idea where you are based but you can always try checking this list:
http://www.findprivateclinics.ca/Quebec/lc-11-0.html