iodine tincture (University of Michigan)

Iodine tincture is a traditional antiseptic solution typically composed of elemental iodine and an iodide salt (such as sodium iodide or potassium iodide) dissolved in a mixture of ethanol and water. It is primarily utilized for skin disinfection prior to medical procedures, including blood culture collection and catheter insertion, to mitigate the risk of healthcare-associated infections like bacteremia. Its mechanism of action is broad-spectrum and non-specific; free iodine rapidly penetrates the cell walls of microorganisms and acts as a potent oxidizing agent, disrupting essential proteins, nucleotides, and fatty acids, which leads to rapid cell death. Clinical studies, including those conducted by the University of Michigan, have compared its efficacy against other antiseptics like povidone-iodine and chlorhexidine gluconate, often finding it highly effective for reducing contamination rates in clinical settings.

Other names

tincture of iodineweak iodine solutioniodine tincture USP