[Freeper 007]

I'm not for forcing the companies to sell anywhere, but I don't see where the African price of these drugs had anything to do with the theft.

These drugs were not bought and resold, they were just plain stolen.

[ArcLight]

From the story:

But about 3m doses of Combivir - a third of the supply - was diverted back to Europe by profiteering wholesalers as it arrived at the African airports or even earlier. "There are indications that perhaps some of these batches never even left Europe," said Alan Chandler, a Glaxo spokesman.

Looks to me like the wholesalers bought the stuff, then decided to resell it for a mega profit in Europe. Not quite the same thing as an out-and-out hijacking.