It has the makings of a David versus Goliath battle, except this time the latter seems to be winning...Pharma Dynamics, a Cape Town-based generic drug maker, is embroiled in a costly legal dispute with giant German multinational Bayer over what's called the "evergreening" of pharmaceutical patents...

This means making small changes to existing products so as to extend their patent protection and keep makers of cheaper generics out of the market.

 Read here.