Action, Medical Uses, and Dosage.—Oil of tansy is a poisonous agent, killing by coma and asphyxiation. The effects are different according to the amount taken. The symptoms may be chiefly gastro-intestinal, or they may be spent mainly upon the nervous system. Thus vomiting and purging, with colicky pains were present in one case, the patient dying in collapse, but the mind remained clear to the last. In other cases there have been increased frequency of the pulse, pupillary dilatation, insensibility, convulsions, with frothing at the mouth, and, occasionally, death is preceded by paralysis of motion, swallowing, and respiration. Doses above 15 or 20 drops are highly dangerous.
Only the first paragraph of the section is transcribed; the next paragraph, on the herb's uses and doses, is not.