Table of Contents
- 1 Why do some medications only exist in injectable forms?
- 2 What are the advantages of injectable method over oral method?
- 3 What is oral injection?
- 4 Why are some medications given by IV and some are not?
- 5 How are drugs absorbed through the oral route?
- 6 What are the disadvantages of preparing powders?
Why do some medications only exist in injectable forms?
They can withstand the physical pressures of a pill bottle or your pocket, protecting the drug. They’re kind of like the transport truck of dosage forms. An injectable medication, on the other hand, conveys the drug in a liquid form along with inactive ingredients.
What are the advantages of injectable method over oral method?
Advantages of parenteral administration: Drugs that are poorly absorbed, inactive or ineffective if given orally can be given by this route. The intravenous route provides immediate onset of action. The intramuscular and subcutaneous routes can be used to achieve slow or delayed onset of action.
Why are some medications not able to be administered orally?
Oral route However, it has limitations because of the way a drug typically moves through the digestive tract. For drugs administered orally, absorption may begin in the mouth and stomach.
Why some drugs are prepared in powder and not in liquid form?
Some medications are supplied in the form of powders or crystals to which a liquid must be added for reconstitution shortly before use. The medications are supplied in dry form because the product can be stored for a long time in dry form but becomes unstable and deteriorates in solution within a relatively short time.
What is oral injection?
Oral administration is a route of administration where a substance is taken through the mouth. Per os abbreviated to P.O. is sometimes used as a direction for medication to be taken orally.
Why are some medications given by IV and some are not?
Certain drugs may be given by IV administration because if you took them orally (by mouth), enzymes in your stomach or liver would break them down. This would prevent the drugs from working well when they’re finally sent to your bloodstream.
What are the disadvantages of injection route of administration?
Disadvantages of the Intravenous Route
- Possible anaphylaxis.
- Risk of infection.
- Inconvenient to the patient.
- Expensive compared to other routes.
- Risk of phlebitis or extravasation.
- Requires trained medical/nursing staff to administer.
- Once injected, the drug cannot be recalled.
What are the disadvantages of intravenous injection?
It also suffers from disadvantages:
- Higher incidence of anaphylactic reactions than with many other routes.
- Possibility of infection or phlebitis at site of injection.
- Greater pain to patients than with many other routes.
How are drugs absorbed through the oral route?
Two fundamental processes describing oral drug absorption include the dissolution of a drug into gastrointestinal (GI) fluid, and the permeation of a dissolved drug through the intestinal wall and into the bloodstream .
What are the disadvantages of preparing powders?
Disadvantages of powders
- Powders are not the dosage form of choice for drugs with unpleasant taste.
- Drugs that deteriorate rapidly with exposure to atmosphere or acidic pH should not be dispensed as powders.
- Powders are bulky and inconvenient to carry.