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As a wholly owned subsidiary of Pfizer Inc., we strive to set the industry standard for quality, safety, and manufacturing.

As part of Pfizer, GREENSTONE follows the same comprehensive and robust quality management system designed for the production and supply of quality products.


• Product standards meet or exceed regulatory requirements and adhere to Pfizer's rigorous internal standards1

• Pfizer's goal is for patients to receive uninterrupted access to our products


• From receipt of raw materials to release testing, our products receive the same rigorous analytical testing as their brand equivalents1

Manufacturing and Supply

• Pfizer continually strives to set the industry standard for quality, safety, and value in the manufacturing of our medicines. Our efficient manufacturing and supply network helps optimize how medicines are delivered to patients2


GREENSTONE receives our product materials from a global network of suppliers. Our sites in North America and Europe manufacture 100% of GREENSTONE's Authorized Generics.

References: 1. Pfizer Inc. Quality Statements for GREENSTONE. Upjohn and Pfizer Quality Statements for GREENSTONE V1D5.2 06062019. Updated June 6, 2019. Accessed February 20, 2019. 2. Pfizer Inc. (2018). The power of science: Pfizer 2017 annual review. https://www.pfizer.com/files/investors/financial_reports/annual_reports/2017/assets/pdf/pfizer-2017-annual-review.pdf. Accessed May 8, 2019.