Drug Interactions

FSRH CEU Response to study: Analysis of reports of unintended pregnancies associated with the combined use of non-enzyme inducing antibiotics and hormonal contraceptives - February 2021

02 February 2021

This statement is a response to a new paper published in BMJ Evidence Based Medicine Journal suggesting that antibiotics may lessen the effectiveness of hormonal contraception.

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FSRH CEU Guidance: Drug Interactions with Hormonal Contraception (May 2022)

09 May 2022

This FSRH Guidance provides evidence-based recommendations and good practice points for health professionals on drug Interaction with Hormonal Contraception. It is intended for use by health professionals working in sexual and reproductive health, general practice, and obstetric and gynaecology settings.

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FSRH CEU Statement: St Johns Wort and Hormonal Contraception (March 2014)

01 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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This document is up-to-date