GlaxoSmithKline has stopped doing business with all Canadian pharmacies selling Glaxo meds to U.S. buyers via the Internet. The pharma giant, maker of big-selling HIV drugs Combivir and Trizivir, cited patient safety and “the maintenance of an adequate product supply [in Canada]” as prompting the cutoff, while uninsured HIVers in the U.S. who count on Canada’s cheaper prices countered that the profit motive led Glaxo to seal the borders.