There is no Purdue Pharma stock symbol since Purdue is a privately held company. Stock symbols only exist for publicly traded companies that sell stocks in the open markets.
None it is a private company
The ticker symbol for Barr Pharmaceuticals is BRL and it is traded on the New York Stock Exchange.
The ticker symbol for King Pharmaceuticals is KG and it is traded on the New York Stock Exchange.
The ticker symbol for Watson Pharmaceuticals is WPI and it is traded on the New York Stock Exchange.
HSP is the ticker symbol for Hospira. Hospira is a publicly traded company selling pharmaceuticals. There stock is traded on the New York Stock Exchange.
The symbol for ACADIA Pharmaceuticals Inc. in NASDAQ is: ACAD.
The symbol for Adamis Pharmaceuticals Corporation in NASDAQ is: ADMP.
The symbol for Celator Pharmaceuticals Inc. in NASDAQ is: CPXX.
The symbol for Conatus Pharmaceuticals Inc. in NASDAQ is: CNAT.
The symbol for Cumberland Pharmaceuticals Inc. in NASDAQ is: CPIX.
The symbol for Galmed Pharmaceuticals Ltd. in NASDAQ is: GLMD.
The symbol for Jazz Pharmaceuticals plc in NASDAQ is: JAZZ.
The symbol for Ligand Pharmaceuticals Incorporated in NASDAQ is: LGND.