in Nov 2020 and in Europe in Sep 2021, and the aforementioned Pfizer voluntary recall across multiple markets and a global pause in shipments of Chantix). In October 2021, US FDA approved Oyster Point Pharma to market Tyrvaya as a new route of varenicline administration through nasal spray for the treatment of dry eye disease. References External links 5-HT3 agonists Benzazepines Bridged heterocyclic compounds Nicotinic agonists Pfizer brands Quinoxalines Smoking cessation World Health Organization essential medicines