Answer
Fesoterodine fumarate does not impair ovulation suppression by oral hormonal contraception or change plasma concentrations of combined oral contraceptives containing ethinylestradiol and levonorgestrel; interaction studies were performed only in adults.
Sources for this answer
- TOVIAZ 4 mg prolonged-release tabletsPfizer Limited · emc · SmPC §4.5 Interaction with other medicinal products · Version 21Document updated
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