The present invention provides new use of 3,4′,5-trihydroxy-stilbene-3-β-D-glucoside. 3,4′,5-trihydroxy-stilbene-3-β-D-glucoside has efficacies of anti-myocardial ischemia by intravenous injection and/or oral administration. It is advantageous that 3,4′,5-trihydroxy-stilbene-3-β-D-glucoside as anti-myocardial ischemia drug is used to prepare the medicine for treating and/or preventing ischemic heart disease.
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