Answer
No, varenicline tartrate did not affect metformin pharmacokinetics, and metformin had no effect on varenicline pharmacokinetics.
Sources for this answer
- CHAMPIX 0.5 mg film-coated tablets; CHAMPIX 1 mg film-coated tabletsPfizer Limited · emc · SmPC §4.5 Interaction with other medicinal products · Version 46Document updated
Sources checked