西洋オトギリソウ(St. John's Wort)と相互作用する薬剤を処方された外来患者に対する服薬指導と併用実態調査

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Ministry Health Welfare of Japan announced the caution for drug interaction of St. John's Wort (SJW), a herbal supplement occasionally used for depression, on May, 2000. Immediately after the announcement, we conducted drug consultation for outpatients prescribed the medicines potentially interacing with SJW. We provided information concerning possible drug interaction with SJW for 741 outpatients (except for pediatrics) during the period of May 22-June 16,2000. The potential drugs prescribed frequently were warfarin (28.0%), theophylline (19.7%), digitalis (18.4%), carbamazepine (7.2%), disopyramide (6.9%) and cyclosporin (6.3%). Of the patients, 401 subjects were surveyed by collecting the questionnaires to clarify the background of SJW drug interaction. Twenty-two subjects (5.5%) have known commercially available SJW products, 5 subjects (1.2%) have ever taken SJW products before and 2 subjects (0.5%) have taken SJW products concomitant with prescribed medicines. Gender difference was observed in paying attention to SJW products; female subjects (8.6%) tended to have more interest in SJW products than male subjects (2.8%). Two subjects taking SJW have realized for the first time that the supplements they took were SJW products when their package photographs were shown at the consultation. Showing the package photographs might be helpful for making the patients easy to identify the SJW products, because most patients do not pay attention to whether the supplements contain SJW or not. It is recommended that drug consultation should be provided to avoid serious drug interaction with SJW while the outpatients are taking potential medicines prescribed.
社団法人日本薬学会の論文
2000-12-01

西洋オトギリソウ(St. John's Wort)と相互作用する薬剤を処方された外来患者に対する服薬指導と併用実態調査

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