All of these basic polymers are used in pharmaceutical applications; however, the grade of material will differ from those used in other markets.  Licenced drug products are registered with a Drug Master File (DMF), ensuring only approved polymers tested with the drug are used to safely contain the product.
The selection of polymer for pharmaceutical packaging will depend on the intended regional market.  There are regulations and requirements specific to certain continents and these are encapsulated within pharmacopoeia, the most common of which are European (EUP), North American (USP), and Japanese (JP).
Some applications require special polymers to be used that will not react with sensitive drug products, for example, Cyclic Olefin Polymer COP