Smoking cessation therapy varenicline tartrate (Champix; Pfizer) is now available again in the UK, having previously been withdrawn from the market, Pfizer has announced. Varenicline, a nicotine receptor partial agonist taken as a daily pill, is a prescription-only medicine for adults. In October 2021, Pfizer recalled Champix owing to the presence of unacceptable levels of nitrosamine compound N-nitroso-varenicline, a probable human carcinogen. In May 2024, Pfizer said it intended to resupply the medicine, but said this would not happen until at least the end of 2024. However, in November 2024 it was announced that generic varenicline was being made available in England, following a deal wit... [Read more]