Birth control
This is an educational list of interactions tied to a public source. It is not a complete medication review and it is not medical advice. Ask a pharmacist, or the clinician who prescribes the medicine, before you start, stop, or change a supplement. A pair that is missing here is not a safety clearance. SupplementScore takes no ads, sponsorships, or affiliate income. How this site is funded.
St. John's wort can make birth control pills less effective. That is a cited interaction, and a failed pill is not a small side effect.
This page does not list every herb someone has worried about online. If a pair is missing, that is not proof it is safe.
Names people search: Combined oral contraceptive pills
Do not combine on your own
NCCIH says St. John's wort can weaken many medicines, and birth control pills are on that list. A weaker pill can mean an unplanned pregnancy. Do not combine them. If you already did, ask a pharmacist or clinician about backup contraception. Do not wait for a cycle to "see what happens."