[danielahn]

I am several steps removed from the industry but to my knowledge -

There is still a regulatory approval process to be able to manufacture the drug - so the cost and time required to receive this approval, then to market the drug as a generic alternative to the existing drug to a market that often doesn't see itself as the ultimate payor (ie. the consumer thinks the insurance companies / government are paying) and may prefer known names, and the original manufacturer's ability to then lower the price of the drug all combine to push away competition on low volume drugs like this one.