Greenstone, a Pfizer company

Greenstone LLC, a US-based company owned by Pfizer Inc., has been providing Authorized Generic versions of original brand name medications for more than 25 years. Greenstone also provides AGs from other manufacturers in addition to several generic products. Greenstone sells over 70 of Pfizer’s brand name drugs as Authorized Generics that are prescribed to treat a range of conditions. To learn more, visit

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