Antiseptics are substances used to prevent infection by killing or inhibiting the growth of harmful microorganisms. They are commonly applied to wounds, cuts, and surgical sites to keep them clean and reduce the risk of infection. Examples of antiseptics include alcohol, iodine, and hydrogen peroxide, which are often found in first aid kits. These agents are different from antibiotics, which are used to treat infections once they occur. Antiseptics are typically used on skin and surfaces, while antibiotics work inside the body. Proper use of antiseptics can help promote healing and protect against complications from injuries or surgeries.