Various Routes Of Drug Administration |

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In this video we study about
Routes Of Administration Of Drugs
Introduction:
Route of drug administration is the path or way by which the drug is introduced ( taken) into body .
There are different types of route of administration , and the choice of route for the drug administration depends on :
a) properties of drug like water or lipid solubility , ionisation etc.
b) therapeutic objectives i.e. rapid onset of action or long term administration or for effect to a local site .
Classification Of route of administration of drugs
Oral route sublingual route Parental route
(in buccal cavity ) ( below the tongue ) (other than GIT )
Parental Route
Injection Inhalation local application
1) Intradermal 1) External preparation
2) Intravenous e.g. ointment , cream
3) Intramuscular 2)Enema
4) subcutaneous etc.
Oral Route
In this route the drug is placed in oral cavity and is swallowed along with water or milk etc.
Advantages
1) It is safe route of drug administration .
2) No special skill is required for administration of drug .
3) It is very convenient route .
4) there are low possibilities of adverse effect reaction .
5) sterilisation is not required for drug taken orally .
6) Large amount of drugs can be administrated by this route .
7) This route is painless .
8) this route is economical .
Disadvantages
1) Onset of action is slow .
2) This route is note useful in clinical emergencies .
3) This route is not useful in unconscious and uncooperative patients .
4) This route is not useful in pre-vomiting and diarrhoea patients .
5) the presence of food in GIT may interfere with absorption of drug.
6) low gastric pH , digestive and liver enzymes destroy drug, before its distribution into circulation .
7) It may cause irritation in GIT.
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