Doctors have been told to advise women who are using hormonal contraceptives, that herbal products containing St John’s Wort can decrease the effect of contraception. Women taking any form of hormonal contraception for birth control have been told not take herbal products that contain St John’s Wort. St John’s Wort interacts with hormonal contraceptives and reduces the effectiveness and increases the risk of unplanned pregnancy. This applies to all hormonal contraceptives except intrauterine devices, for which there are currently no data St John’s Wort (Hypericum perforatum L.) is grown in gardens around the UK but it's also been used historically... Read more →
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