If it goes ahead, Wal-Mart will enter via acquisition of local retailer Massmart which is, as the name suggests, a copy-cat company anyway, so it would seem all there is to talk about is price.
One solution is to import generic drugs from countries such as India, which does a thriving trade in copy-cat pharmaceuticals because it is not yet obliged to recognise drug patents.
This effort is at the top of a list Forbes.com published this week ranking the 20 best-ever social media campaigns and continues to inspire copy-cat efforts.