Drug/Herb Interactions-OCP

 Just wanted to see if anyone had experience with herbs making the oral contraceptive pill (OCP), or any hormonal birth control -- less effective.  Before you laugh, here are some links about St. John's Wort:

Scroll down to the Drug Interaction section of these 2 sites.

http://en.wikipedia.org/wiki/Combined_oral_contraceptive_pill

 

http://www.nlm.nih.gov/medlineplus/druginfo/natural/patient-stjohnswort.html

 

This study on pubmed shows that 300 mg of St. John's Wort taken 3x/day induces liver enzyme P450 and affects blood level hormones...any herb could have this effect as well, so maybe we should consider this and request that patients take herbs at different times of the day from when they take the OCP.

http://www.ncbi.nlm.nih.gov/pubmed/14663455