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Digitalis is obtained from foxglove leaves and used to strengthen heart contractions. It increases heart muscle contractility and is used to treat heart failure. This document describes two methods to assay the potency of a prepared digitalis sample compared to a standard. The first method injects extracts into guinea pigs until cardiac arrest. The second injects extracts into pigeons until heart stoppage, identified by vomiting. Potency is calculated by comparing lethal doses between standard and sample ex

Author

m ahsan

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EN