Answer
They should contact their prescriber and take a pregnancy test where appropriate rather than assuming it is a medicine effect. Menstrual changes are reported, but selected products are contraindicated during pregnancy.
Sources for this answer
- PHEBURANE 350 mg/mL oral solution — Current selected SmPCemc · Summary of Product Characteristics
- Ammonaps 500 mg tablets — Current selected SmPCemc · Summary of Product Characteristics