route of drug administration · systemic-parenteral parenteral administration is injection or...

Route of Drug administration By Debashish Gardia

Drug Administration

• Drug: the agent which is obtained from plant, animal, mineral, marine or synthetic source that is taken in a predefined amount to get desired therapeutic effect.

• Drug Administration: the process of putting drug into body cavity is called drug administration.

Routes of drug administration

• Route means the path by which the drug enters into the body cavity.

• E.g Otrivin nasal drop is administered through nasal route.

• E.g Insulin is administered through subcutaneous (SC) route.

Oral Route

• For drugs administered orally, absorption may begin in the mouth and stomach.

• However, most drugs are usually absorbed from the small intestine.

• The drug passes through the intestinal wall and travels to the liver before being transported via the bloodstream to its target site.

Oral route

Advantage

• Safe

• Easy to use

• Cheap

• Less painful

Disadvantage

• Slow onset of action

• First Pass metabolism

• Drugs may get deteriorated by stomach acid and enzymes

• Not appropriate for medical emergency

Topical route of drug administration

• Definiton: The application of drug directly on the surface of the skin.

• It also include administration of drug to any mucous membrane.

• Eyes • Nose • Year • Skin surface • Vagina • Urethra

• It primarily provides local effect

• One can clean off old medication at the same place.