Where is the pathogenesis of this remedy found ? Allen's Encyclopaedia and Hale's New Remedies . What is the common name, origin, and preparation used of this drug ? Indian Hemp , growing all over the United States. Tincture from the fresh root in the same manner as Gelsemium is prepared. The tincture is deep orange red in color. What is its general action ? Acts especially upon the kidneys, skin and serous membranes, giving rise to various dropsical affections. It depresses the heart, slowing and weakening the pulse. What is its chief homoeopathic use ? In dropsical conditions, such as hydrocephalus and abdominal dropsies, where it is given as a diuretic ; the principal indication is a copious yellow or brownish diarrhoea, expelled with great force, and a weak, all-gone feeling in the abdomen ; oppression about the epigastrium and chest. What does it differ from Arsenic and Apis ? It has unquenchable thirst. Arsenic wants little and often, Apis thirstless. The boating in Apocynum is on the side on which he lies. Arsenic in the extremities. Apis under the eyes.