yes, this is the reality of the world: research cost money and only those avenues that are productive are followed. a large cost is created due to the regulation we insist on to stop dodgy drugs with adverse, unknown side effects. i wonder how it really would play out if there were hundreds of...
its not used because it hasn't passed through the hurdles of regulation we have concerning new drugs. who's going to pay for the research when previously there's a few hundred cases?