US pharmacy chain tracks customer's use of herbals.
Helwig
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D016907:Adverse Drug Reaction Reporting Systems; D004347:Drug Interactions; D004365:Drugs, Chinese Herbal / Q000009:adverse effects*; D006801:Humans; D020407:Internet; D010593:Pharmaceutical Services; D008517:Phytotherapy
D004365:Drugs, Chinese Herbal