The Pfizer Injectables portfolio of hospital products now includes heparin sodium injection, USP. The production of crude heparin begins with raw materials supplied by facilities in Iowa and Toronto. The active pharmaceutical ingredient is processed and purified at the Pfizer's Ohio plant, then the purified heparin sodium is manufactured and packaged at Pfizer's Michigan facility, and the final product is shipped from Pfizer's logistics center in Tennessee. Heparin sodium injection, USP is available in four strengths. Visit Pfizer Injectables website for other information, including NDCs and ordering numbers.