What current med / supplement is Mrs. Z taking that likely results in diminished clinical effectiveness or increased dosage requirements for her other medications?

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St. John's wort is known to decrease the effectiveness of many prescription medications by inducing enzymes in the liver that metabolize drugs. This can result in a need for increased dosages of other medications. Therefore, Mrs. Z taking St. John's wort is likely to result in diminished clinical effectiveness or increased dosage requirements for her other medications.

What Current Med / Supplement Is Mrs