Endo’s Par unit has launched the first US generic rival to Pfizer’s (varenicline) tablets, coinciding with current shortages of the product after the originator recalled the brand due to the discovery of nitrosamine impurities.
Confirming that Par has begun shipping varenicline 0.5mg and 1mg tablets – following an early US Food and Drug Administration approval of the product in August (Also see "FDA Looks To Solve Chantix Shortage With Par ANDA Approval" - Generics Bulletin, 17 August, 2021