Antibiotics are biochemical substances that kill and stop the growth of bacteria. They work by intervening with the cell wall synthesis and nucleic acid metabolism, and by inhibiting protein synthesis. Before starting antibiotic therapy, it should be based on the possible organisms involved, the incidence of the resistance of the organism, pharmacology, measure of severity, frequency, importance, and availability.
The hallmark of an antibiotic is that it is cheap and reasonably available. Antiseptic, on the other hand, will inhibit the growth and progression of the microorganisms short of necessarily killing them. They can be topical agents that are applied to the skin, mucous membranes, and personal objects that can be internally used instruments such as urinary tract antiseptics. They are often employed in the purification of the skin and wound surfaces, preparation of the skin before surgical procedures, for oral hygiene, cleaning of items including furniture, and other various objects.