A few things about Antiseptics

Antiseptics and disinfectants have been used in medical environments for centuries. Both antiseptics and disinfectants act as antimicrobials that kill microbes which cause infection. The primary difference between the two is that disinfectants are used on objects, such as surfaces or surgical tools, while antiseptics are used directly on human skin. It is easy to use either disinfectants or antiseptics, making it possible to dress a minor wound.


Most chemical agents can be used as both an antiseptic and a disinfectant. The purpose for which it is used is determined by its concentration. For example hydrogen peroxide 6% solution is used for cleansing wounds, while stronger solutions (>30%) are used in industry as a bleach and oxidising agent.

Antiseptics are mainly used to reduce levels of microorganisms on the skin and mucous membranes. The skin and mucous membranes of the mouth, nose, and vagina are home to a large number of what are usually harmless micro-organisms. However, when the skin or mucous membranes are damaged or breached in surgery, antiseptics can be used to disinfect the area and reduce the chances of infection. It is also important that people whom are treating patients with wounds or burns adequately wash their hands with antiseptic solutions to minimize the risk of cross infection.
Antiseptics are used for:
• Handwashing – chlorhexidine gluconate and povidone iodine solutions are often used in hand scrubs.
• Pre-operative skin disinfection – antiseptics applied to the operation site to reduce the resident skin flora.
• Mucous membrane disinfection – antiseptic irrigations may be instilled into the bladder, urethra or vagina to treat infections or cleanse the cavity prior to catheterization.
• Preventing and treating infected wounds and burns – antiseptic preparations are available over-the-counter from your pharmacist to treat minor cuts, abrasions and burns.
• Treating mouth and throat infections – dequalinium chloride has both antibacterial and antifungal properties and is the active ingredient in antiseptic throat lozenges.

Antiseptics bought from the pharmacy should not be used for more than one week. If the affected area has not healed or improved in that time you should stop using the antiseptic and see your doctor. Large wounds, deep cuts, burns larger than a small red spot, scrapes imbedded with particles that won’t wash away, animal bites and eye injuries should be treated by your doctor. Do not use antiseptics to treat sunburn or existing skin infections. Remember that antiseptics only reduce microorganisms on the surface of the tissue and that antibiotics will be needed to treat infection within the tissues.

People with allergies of any kind should check with a doctor or pharmacist before using an over-the-counter antiseptic product. Some antiseptics can irritate the skin and cause allergic contact dermatitis.