AskDefine | Define antiseptic

Dictionary Definition

antiseptic adj
1 thoroughly clean and free of or destructive to disease-causing organisms; "doctors in antiseptic green coats"; "the antiseptic effect of alcohol"; "it is said that marjoram has antiseptic qualities" [ant: septic]
2 clean and honest; "antiseptic financial practices"
3 freeing from error or corruption; "the antiseptic effect of sturdy criticism"
4 made free from live bacteria or other microorganisms; "sterilized instruments" [syn: sterilized, sterilised]
5 (extended sense) of exceptionally clean language; "lyrics as antiseptic as Sunday School" n : a substance that destroys micro-organisms that carry disease without harming body tissues

User Contributed Dictionary



  1. Of, or relating to antisepsis, or the use of antiseptics.
  2. Capable of preventing microbial infection.
  3. Very clean; aseptic.
  4. Free of unpleasantness; sanitized or bowdlerized.


of or relating to antisepsis
  • Croatian: antiseptičan
capable of preventing microbial infection
  • Croatian: antiseptičan
very clean; aseptic
  • Croatian: antiseptičan
sanitized or bowdlerized
  • Croatian: antiseptičan


  1. Any substance that inhibits the growth and reproduction of microorganisms.


substance that inhibits the growth of microorganisms
  • Croatian: antiseptik
  • French: antiseptique
  • Japanese: 防腐剤 (bōfuzai)


Extensive Definition

Antiseptics (from Greek αντί - anti, '"against" + σηπτικός - septikos, "putrefactive") are antimicrobial substances that are applied to living tissue/skin to reduce the possibility of infection, sepsis, or putrefaction. They should generally be distinguished from antibiotics that destroy bacteria within the body, and from disinfectants, which destroy microorganisms found on non-living objects. Some antiseptics are true germicides, capable of destroying microbes (bacteriocidal), whilst others are bacteriostatic and only prevent or inhibit their growth. Antibacterials are antiseptics that only act against bacteria.

Use in surgery

The widespread introduction of antiseptic surgical methods followed the publishing of the paper Antiseptic Principle of the Practice of Surgery in 1867 by Joseph Lister, inspired by Louis Pasteur's germ theory of putrefaction. In this paper he advocated the use of carbolic acid (phenol) as a method of ensuring that any germs present were killed. Some of this work was anticipated by: and even the ancient Greek physicians Galen (ca 130–200 AD) and Hippocrates (ca 400 BC). There is even a Sumerian clay tablet dating from 2150 BC advocating the use of similar techniques.
But every antiseptic, however good, is more or less toxic and irritating to a wounded surface. Hence it is that the antiseptic method has been replaced in the surgery of today by the aseptic method, which relies on keeping free from the invasion of bacteria rather than destroying them when present.

How it works

For the growth of bacteria there must be a certain food supply, moisture, in most cases oxygen, and a certain minimum temperature (see bacteriology). These conditions have been specially studied and applied in connection with the preserving of food and in the ancient practice of embalming the dead, which is the earliest illustration of the systematic use of antiseptics.
In early inquiries a great point was made of the prevention of putrefaction, and work was done in the way of finding how much of an agent must be added to a given solution, in order that the bacteria accidentally present might not develop. But for various reasons this was an inexact method, and today an antiseptic is judged by its effects on pure cultures of definite pathogenic celicular single helix microbes, and on their vegetative and spore forms. Their standardization has been affected in many instances, and a water solution of phenol of a certain fixed strength is now taken as the standard with which other antiseptics are compared.

Some common antiseptics

  • ;Boric acid: Used in suppositories to treat yeast infections of the vagina, in eyewashes, and as an antiviral to shorten the duration of cold sore attacks. Put into creams for burns. Also common in trace amounts in eye contact solution. Though it is popularly known as an antiseptic, it is in reality only a soothing fluid, and bacteria will flourish comfortably in contact with it.
  • ;Chlorhexidine Gluconate: A biguanidine derivative, used in concentrations of 0.5 - 4.0% alone or in lower concentrations in combination with other compounds, such as alcohols. Used as a skin antiseptic and to treat inflammation of the gums (gingivitis). The microbicidal action is somewhat slow, but remanent. It is a cationic surfactant, similar to Quats.
  • ;Hydrogen peroxide: Used as a 6% (20Vols) solution to clean and deodorize wounds and ulcers. More common 1% or 2% solutions of hydrogen peroxide have been used in household first aid for scrapes, etc. However, even this less potent form is no longer recommended for typical wound care as the strong oxidization causes scar formation and increases healing time. Gentle washing with mild soap and water or rinsing a scrape with sterile saline is a better practice.
  • ;Iodine: Usually used in an alcoholic solution (called tincture of iodine) or as Lugol's iodine solution as a pre- and post-operative antiseptic. No longer recommended to disinfect minor wounds because it induces scar tissue formation and increases healing time. Gentle washing with mild soap and water or rinsing a scrape with sterile saline is a better practice. Novel iodine antiseptics containing povidone-iodine (an iodophor, complex of povidone, a water-soluble polymer, with triiodide anions I3-, containing about 10% of active iodine) are far better tolerated, don't affect wound healing negativelly and leave a depot of active iodine, creating the so-called "remanent," or persistent, effect. The great advantage of iodine antiseptics is the widest scope of antimicrobial activity, killing all principial pathogenes and given enough time even spores, which are considered to be the most difficult form of microorganisms to be inactivated by disinfectants and antiseptics.
  • ;Octenidine dihydrochloride: A cationic surfactant and bis-(dihydropyridinyl)-decane derivative, used in concentrations of 0.1 - 2.0%. It is similar in its action to the Quats, but is of somewhat broader spectrum of activity. Octenidine is currently increasingly used in continental Europe as a QAC's and chlorhexidine (with respect to its slow action and concerns about the carcinogenic impurity 4-chloroaniline) substitute in water- or alcohol-based skin, mucosa and wound antiseptic. In aqueous formulations, it is often potentiated with addition of 2-phenoxyethanol.
  • ;Phenol (carbolic acid) compounds: Phenol is germicidal in strong solution, inhibitory in weaker ones. Used as a "scrub" for pre-operative hand cleansing. Used in the form of a powder as an antiseptic baby powder, where it is dusted onto the navel as it heals. Also used in mouthwashes and throat lozenges, where it has a painkilling effect as well as an antiseptic one. Example: TCP. Other phenolic antiseptics include historically important, but today rarely used (sometimes in dental surgery) thymol, today obsolete hexachlorophene, still used triclosan and sodium 3,5-dibromo-4-hydroxybenzenesulfonate (Dibromol).
  • ;Sodium chloride: Used as a general cleanser. Also used as an antiseptic mouthwash. Only a weak antiseptic effect, due to hyperosmolality of the solution above 0.9%.

Negative effects

Stuart B. Levy, in a presentation to the 2000 Emerging Infectious Diseases Conference, expressed concern that the overuse of antiseptic and antibacterial agents might lead to an increase in dangerous, resistant strains of bacteria.


The body produces its own antiseptics, which are a part of the chemical barriers of the immune system. The skin and respiratory tract secrete antimicrobial peptides such as the β-defensins. Enzymes such as lysozyme and phospholipase A2 in saliva, tears, and breast milk are also antiseptic. Vaginal secretions serve as a chemical barrier following menarche, when they become slightly acidic, while semen contains defensins and zinc to kill pathogens. In the stomach, gastric acid and proteases serve as powerful chemical defenses against ingested pathogens.


antiseptic in Danish: Antisepsis
antiseptic in German: Antiseptikum
antiseptic in Spanish: Antiséptico
antiseptic in Finnish: Antiseptiikka
antiseptic in French: Antiseptique
antiseptic in Indonesian: Antiseptik
antiseptic in Italian: Antisettico
antiseptic in Japanese: 殺菌剤 (医薬品)
antiseptic in Dutch: Antisepsis
antiseptic in Polish: Antyseptyka
antiseptic in Portuguese: Anti-séptico
antiseptic in Russian: Антисептик
antiseptic in Turkish: Antiseptik
antiseptic in Ukrainian: Антисептик

Synonyms, Antonyms and Related Words

Argyrol, Mercurochrome, Merthiolate, Salol, acaricide, alcohol, anthelmintic, antibiotic, aseptic, bactericide, boiled, boric acid, bug bomb, calomel, camphor, carbamate insecticide, carbolic acid, chemosterilant, chloramine, chlorinated hydrocarbon insecticide, contact poison, cresol, decontaminated, defoliant, disinfectant, disinfected, eradicant, fumigant, fumigator, fungicide, gentian violet, germicidal, germicide, gramicidin, herbicide, hexachloraphene, hydrogen peroxide, hygienic, insect powder, insecticide, iodine, microbicide, miticide, organic chlorine, organic phosphate insecticide, pasteurized, peroxide, pesticide, phenol, phenyl salicylate, poison, prophylactic, rat poison, resorcinol, roach paste, roach powder, rodenticide, sanitary, silver vitellin, sterile, sterilized, stomach poison, systemic, systemic insecticide, thimerosal, thymol, tincture of iodine, toxic, toxicant, toxin, uninfected, venin, venom, vermicide, virus, weed killer
Privacy Policy, About Us, Terms and Conditions, Contact Us
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2
Material from Wikipedia, Wiktionary, Dict
Valid HTML 4.01 Strict, Valid CSS Level 2.1