Companies selling anti-smoking drugs, generic for Champix are on alert. Health authorities are investigating Nitrosamines impurities in Varenicline. It seems that sales are facing difficulties due to unfavorable factors such as COVID-19 incident and follow-up measures of impurities after passing the patent dispute in Korea.

According to an industry on the 15th, pharmaceutical companies that manufacture and sell generics for Champix (Varenicline) are preparing documents related to testing impurities in Nitrosamine.

This is because the MFDS identified the possibility of Nitrosamines impurities in Varenicline and ordered follow-up measures. As the possibility of detection of Nitrosamine impu