I have been on Yaz birth control for over a month now and have recently started taking St Johns Wart. I am on my second week of taking this supplement.

I read that it could cause the pill to be inactive.

Do I have reason to worry and should I take the morning after pill.

I have subsequently stopped taking St Johns Wart.

Dosage of St John: (2 x pills per day)
Hypercium 165mg
Equiv hypercin 490mg

Thank you for your assistance.