An antiseptic is a substance that prevents the growth of or kills pathogens like bacteria, viruses, and fungi on living tissues, such as skin and mucous membranes. Commonly used in medical settings, antiseptics help reduce the risk of infection during surgeries, wound care, and other procedures. Unlike disinfectants, which are used on inanimate surfaces, antiseptics are specifically formulated to be safe for use on the human body. Examples include alcohol, iodine solutions, and chlorhexidine.