The essay outlines the recent medical adoption of iodine, recounting early clinical reports of effectiveness against goitre and related scrofulous and tuberculous disorders while documenting serious toxic reactions that followed indiscriminate use. It analyzes the drug’s physiological effects and characteristic symptoms of poisoning, presents practical case observations and reported outcomes, and offers concrete guidance on dosing, administration, and monitoring. The author urges cautious, studied application to secure therapeutic benefit and to recognize and manage adverse consequences promptly.