Woody,
I did some searching, nothing I would categorize as exhaustive, but here again is a summary, which supports Sandi, and points out the error of my earlier statement. This is from the Canadian Pharmacists Association, a volunteer organization:
"1. Can Americans have their prescriptions filled by Canadian pharmacists?
Canadian pharmacists can only fill prescriptions that have been written by a health professional licensed to prescribe in Canada. Therefore, prescriptions written by American doctors cannot be filled legally by Canadian pharmacists, unless they hold a Canadian licence.
Some online pharmacies may offer to have a Canadian physician co-sign a prescription written by a US physician. This practice is not supported by the pharmacy or medical professions in Canada or the United States, as patient care can be compromised in such situations.
It is extremely important to always go to one pharmacy so your pharmacist is aware of all medications you are taking - prescription, over-the-counter and herbal - and your overall health. "
Somewhere else I found a reference that there was a maximum number of days of supply that a foreign (US) citizen could acquire, legally. I believe that this required a physical visit to fulfill the prescription, but having been proved wrong, this may be incorrect.
I would suggest that you speak with your doctor.
I understand the situation you may be faced with. A number of years ago, I was faced with purchasing some prescription medication in Canada. One of the options, given the cost in Canada, was to travel overseas, with a valid prescription, to purchase the medication in the source country. With a round trip ticket, first class, and a week in country to process the paper, it was cheaper than Canada, (not including meals and hotel etc.) Ultimately, the medication was purchased locally at the higher amount, my personal cost/benefit analysis kept me home. No regrets, other than missing the scenery.
Pharmaceuticals sold and produced in Canada meet standards comparable, but different, than the US. The challenge with on-line pharmacies is the fact that you do not know the source, given the inherent ability of the Internet to hide behind a seemingly legitimate facade. (I know you know this, this is more for folks that drop in here in a few months.)
I checked the FDA site, (what a mess), you should too. It's not clear what you can or can not do (the answer may be on the customs site).
I'll put my advocate hat on here and suggest something;
Drug pricing appears to be wildly distorted, and US citizens are not always bearing the brunt of this. The pharma companies do have a right to recover costs, and make a profit, IMHO. But they are global, and they sell globally, so it would make some sense, to me, that costs, and profits are shared the same way. This will take some will on the part of our leaders, and essentially leads to some regulation of trade.
But hey, what do I know. Just my opinion.
In any event, Woody, if you choose an alternative, be careful. I would not want to miss your critiques of my photo's (and others) because you got some bad stuff.