What is the primary action of an antiseptic?

• A. Kills all bacteria instantly
• B. Causes tissue damage
• C. Neutralizes viruses
• D. Prevents the multiplication of micro-organisms

Answer: (D)

The main idea is that antiseptics act to reduce infection risk by stopping microorganisms from multiplying on living tissue. Their primary effect is to prevent growth (a bacteriostatic type of action), which lowers the number of microbes you’re dealing with and gives the body’s defenses a better chance to clear them. Some agents can kill certain organisms under the right conditions, but that isn’t the standard or most consistent description of what antiseptics do in practice. They’re also not intended to damage tissue; that would defeat their purpose on skin or mucous membranes. So the best one-line description is: they prevent the multiplication of micro-organisms.