Most water based extraction methods invoke water soluble foilants. This isn't really new. I started using the waterless a/b years back, long before I posted it as a technique, for that very reason.
IN addition, the variation in formulation between pills have pretty much done in the concept of simple or universal extraction methods. The polymers in the mix these days are designed to foil a/b methods, to impede the reaction, and to foil alcohol extraction.
Read Fester's Deconstructionist thread; Prepuce and EvilScripter have a work-in-progress method on short path distillation; a few other methods specific to certain pills work. If a method is older than four or five months, it likely doesn't work as advertised anymore.