Yes, St. John's wort would reduce effectiveness of the BC's.
There may be withdrawal bleeding.
Seems most of the BC actions would be lost...why bother using them at all then?
Here is a list to consult about other medications etc with St.John's Wort:
http://www.drugs.com/drug-interactio...hn-s-wort.html
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Weezie looking at petunias 8.25.2017
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