This site is intended for healthcare professionals

Go to /sign-in page

You can view 5 more pages before signing in

Oral contraceptives and St John's wort

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

St John's wort (SJW) interacts with oral contraceptives and may lead to reduced blood levels with a risk of breakthrough bleeding and unplanned pregnancy.

It is advised that SJW is stopped if a patient is taking an oral contraceptive.

The MHRA states "...St John's wort interacts with hormonal contraceptives. This interaction reduces the effectiveness of these contraceptives and increases the risk of unplanned pregnancy. This applies to all hormonal contraceptives except intrauterine devices, for which there are currently no data...

Advise women taking hormonal contraceptives for pregnancy prevention not to take herbal products containing St John's wort..."


Related pages

Create an account to add page annotations

Add information to this page that would be handy to have on hand during a consultation, such as a web address or phone number. This information will always be displayed when you visit this page