From Bloomberg:
Canadian Pharmacies Looking Abroad for Pfizer Drugs
Canadian pharmacies that have been cut off from selling Pfizer Inc.'s Lipitor, Viagra and other drugs are seeking supplies abroad and asking customers to slice larger pills into prescribed doses to conserve remaining stock.

Granville Pharmacy, a Canadian Internet drugstore recommended on Wisconsin and Minnesota state Web sites, takes weeks instead of days to fill orders for New York-based Pfizer's cholesterol-lowering Lipitor and the arthritis drug Celebrex as supplies dwindle, said Sharmani Pillay, a Granville pharmacist.

From the Indianapolis Star:
Canadian druggists looking to England
Canadian pharmacies that have been cut off from selling prescription drugs made in the United States are seeking supplies abroad and asking customers to slice larger pills into prescribed doses to conserve remaining stock.

U.S. drugmakers, including Indianapolis-based Eli Lilly and Co., have notified Canadian pharmacies that wholesaler orders that increase sharply will not be filled. Such changes suggest the drugs are being shipped outside Canada to the United States, said Ed Sagebiel, a Lilly spokesman.