The current version of the EMA/CMDh nitrosamine Q&A document "Questions and answers for marketing authorisation holders/applicants on the CHMP Opinion for the Article 5(3) of Regulation (EC) No 726/2004 referral on nitrosamine impurities in human medicinal products", dated October 2023, contains Annex 1 and three further appendices (Appendix 1-3). In December 2023, Appendix 1 was updated and now contains five additional substances.