OBJECTIVE To determine the methodological quality of clinical trials that examined possible interactions of St John's wort with conventional drugs, and to examine the results of these trials. DESIGN Systematic review. DATA SOURCES Electronic databases from inception to April 2004, reference lists from published reports, and experts in the field. STUDY SELECTION Eligible studies were prosp...

BACKGROUND Herbal products obtained over the counter are commonly used in Europe, North America and Australia. Although there is concern about a lack of information provided to consumers to allow the safe use of these products, there has been no published research to confirm these fears. In this study, we evaluated written information provided with commonly used herbal products in the UK in adv...