For all Canadians going to study in the US:
Provincial and federal loans and bursaries are available. Usually bursaries are not allowed. Call up the responsible bureau and ask for information about applications, required documents and if the institution you are attending is eligible for loans, if not, you may be allowed to appeal that.
CanHelp loans are available but apparently are ill advised due to their over 8% loan fee.
Next choice after provincial and federal loans are to go to the banks.
RBC, possible but they don't seem to loan to students studying outside of Canada.
CIBC, TD and BMO all have line of credits for professional students such as optometry students with 20 000$ max limit per year, need a co-signer, monthly interest payments are required, and if you need more than 20 000$ then you can discuss this with your bank. It is possible. It is important to choose a co-signer who will allow the bank to give you the most loans.
Call the hotlines for the banks, make an appointment with the agent and I suggest to apply in person and not online or over the phone.
There may also be other banks but they don't seem to loan to students not attending institutions in Canada or their own home province.
Scholarships, bursaries and workstudy can help a bit as well.