Published on: 1 March 2014
St Johns wort is a herbal product that is used for depressive symptoms and is known to have enzyme-inducing effects on cytochrome p450 enzymes. The MHRA statement highlights that in the last quarter of 2013, two ‘Yellow Card’ reports were received relating to unplanned pregnancies, in women with progestogen-only implants, suspected to be the result of an interaction with St John’s wort.
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