I believe it is from a "company" selling generic viagra and other "medications" without the requirement of a doctor's prescription. No idea as to their trustworthiness.
It's insane, Canadian Pharmacy has been calling me incessantly for 11 years. I propose creating a petition to the United States government, to threaten Canada with a declaration of war, limited, laser targeted, precision air strikes on any Canadian Pharmacy location, if they do not cease and desist calling, I believe it takes a half a million signatures to petition congress, (if they are not on vacation) Surely canadian pharmacy has called tens of millions of people in the United States who would be glad to sign a petition to put them out of business, for good