1 reported case
I agree with dr. Kwok that st.
John's wort is generally safe, and that it can alter metabolism of other drugs being taken. There are rare reports of liver toxicity with it, usually when used along with other medicines that can affect liver function. Such as: http://tinyurl.Com/9g42dq3 the authors focus on the "wort" but this may not be appropriate. For more info: http://tinyurl.Com/8czuogt.