Cactus grandiflorus MT acts on circular muscular fibres, hence constrictions. It is the heat and arteries specially that at once respond to the influence of Cactus, producing very characteristic constrictions as of an iron band. It is used in haemorrhage, constrictions, periodicity and spasmodic pains. It is also used in toxic goiter with cardiac symptoms. It is used in the treatment of palpitations and angina pectoris. The alkaloid cactine is reputed to have a digitalis-like activity on the heart. It is said to greatly increase renal secretion and does not appear to weaken the nervous system. It frequently gives prompt relief in functional or organic heart disease. It also has been used in haemoptysis, dropsy and incipient apoplexy.

Reference

1. W. Boericke, New Manual of Homoeopathic Materia Medica & Repertory [with Relationship of Remedies], Second Re-Augmented & Revised Edition Based on Ninth Edition, Reprint Edition 2002, B. Jain Publishers, New Delhi.
2. Dr. P. N. Varma, et al., A Compendium of Rare and Clinically Established Mother Tinctures, 4th Edition, Dr. Willmar Schwabe India Pvt. Ltd., A-36, Sector 60, Noida.