Abstract
Summary
The pharmacological action and method of preparation of a substance obtained from various species of Ilex are described. The action of the drug resembles very closely that of the digitalis bodies. It produces first an increase in the amplitude of the heart by increased relaxation and increased systolic contraction, followed by decreased relaxation in diastole with slowing and finally systolic standstill. All attempts to obtain the substance in crystalline form were unsuccessful. The possibility of the substance being caffeine is considered.
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