Digitalis is the remedy most frequently used for weak heart action, but has to be given in large doses of the fluid extract, and that is quite apt to produce nausea and vomiting. Glonoine is the remedy for rapid action, especially if there is rapid breathing as after running. Spigelia is beneficial in neuralgia of or about the breast.

Veratrum viride can be given for rapid action of the heart, but must be stopped if it causes nausea. Amyl nitrite, one part to three to five, according to the patient, of alcohol and inhaled.