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Table 2 St John's worta

From: Buyer beware? Does the information provided with herbal products available over the counter enable safe use?

Study number 1 2 3 4 67 70 72 75 30 31 32 41 48 58 61
Where bought HF HF HF HF HF HF HF HF Ph Ph Ph Ph Ph SM SM
Legal category U U U THR U U U U U THR U U U U U
Leaflet supplied? No No No Yes No No No No No Yes Yes No Yes No No
Precautions, n = 1 1 0 1 1 0 0 0 1 1 1 1 0 1 0 1
Interactions, n = 8 0 0 0 8 0 0 0 0 7 8 7 0 7 0 0
Side effects, n = 7 0 0 0 5 0 0 0 0 0 5 0 0 0 0 0
  1. aHF = health food shop, Ph = pharmacy, SM = supermarket, U = unlicensed, THR = traditional herbal registration, PL = product licence. Each product is listed by study number, where St John's wort was bought, legal category, whether a leaflet was supplied and the number of safety messages (under 'Precautions', 'Interactions' and 'Side effects').