Daraprim is a drug which SHOULD be available generically in the US but isn't (because it's ancient). He artificially limited the availability of it as part of the deal buying it then price gouged. Not illegal, but he's a cunt for it.
It was developed by a company bought by GSK, then the rights sold to a different company before Turing bought it. In other countries it's available for under $1 per pill (compared to $750 per pill).
Where did you get all that about Turing having done extra development on it? It sounds like you copy pasted it straight from their website and believe all their marketing bollocks. "No side effects" is a flat out lie.
Having gone through their website (Vyera Pharmaceuticals) to their page on Daraprim (
http://daraprimdirect.com), it states that the side effects still include neutropaenia, arrhythmias, teratogenicity etc and the BNF also lists them. You clearly have no idea what the fuck you're on about.
There is not a single drug on the face of the planet which does not have side effects (yes, even oxygen).