Why does FDA prohibit buying medicine from pharmacies outside of the US?
FDA generally prohibits the importation of foreign-made versions of prescription medications that are commercially available in the US. The safety and efficacy of these medications cannot be guaranteed. Many countries’ drug research and control programs are not as safety-oriented as those in the US.
Some of the drugs advertised by foreign sites may be manufactured by the same name brand international drug manufacturer as you are used to, but they are not usually manufactured in FDA-inspected facilities that have met FDA standards. The medications may have been subjected to storage conditions that compromised their potency or safety.
Finally, keep in mind that many rogue sites take advantage of Americans’ trust in Canada’s drug supply system and pretend to be Canadian pharmacies when they are not.