It is because of importation. Here is the IDEAL situation for the drug companies:
1. First world sales cover the vast majority of profit/R&D/advertising costs.
2. 3rd world countries get reduced prices, but the drugs STAY THERE.
It is not that. Again,
pay attention: The cost of medicine here, Brazil is already 4 times the USA cost, just because the dollar/Real vallorization. A product that in USA have a "normal" cost around 100,00 dollars would cost here 400,00. Already more than 60% of brazilian population that receive salaries, receive bellow 400,00.
There is not a market to buy the products for a similar price of the USA, even without the importation. It is not even necessary to worry about this, there is no whom to buy it. The lababoratories wont reduce they base price to sell here, to fix it to the brazilian market monetary power, so they just do not sell or care. You must understand that the importation is irrelevant and Medicine does not even pay taxes here.
Of course the labs can not even allow the sell the products by a lower price (or produce them) because would be possible to an USA buy here and even paying importantion taxes to have it more cheap than he would buying in USA. That is the reason of the lack of interest of the companies to produce to serve the third world demand. Nothing to do with importations.
Most drugs do not occur in nature, when they do it is in such low quantities that harvesting it is not economically viable. Many drugs are flourinated ... nature does flourinate. Many drugs do involve structures quite similar to natural structures ...
Ok, I am doing a mistake calling by natural drugs the drugs produced by non-industrial means or used by the natives. Please just read all that wrote with this little change.
Further international law is fairly specific, he who isolates a specific compound ...
That is the whole stealing problem. The researches found natives using some substance and they just get the plant (or what is necessary to produce it) , reproduce that in the laboratory and claim the register. That is something happening.
Plus the laws are under huge argument. The laboratories do try to just reproduce natural products to register as their own products (Happened with the Bathrox, the famous most poisonous frog in the world, they got the frog from here illegaly but this failed because the frong only produce the poison if he feeds with an special vegetable).
Muffin is food. Food is good. I am a Muffin. I am good.