Compounded Pyrimethamine: 'Personalized Medicine' Or 'Unapproved Drug'?

Responding to the Express Scripts' deal to promote use of a compounded alternative to its drug, Turing says physicians shouldn't prescribe the compound, since it is an unapproved and unsafe drug. But the compounder, Imprimis, says each prescription is custom-made, making it a "personalized medicine."