Shared Flashcard Set

Details

Drug Release II
N/A
24
Other
Graduate
10/03/2009

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Cards

Term
What are 2 Physicochemical Parameters?
Definition
• Drug

• Dosage Form
Term
What are 3 Physicochemical Parameters of Drugs?
Definition
• Hydrophilic Drugs
• Hydrophobic Drugs
• Weak Acid or Weak Base
Term
Describe rate of release for Hydrophilic Drugs and what they are used for
Definition
– Rapid rate of release
– Used for more immediate release
Term
Describe rate of release for Hydrophobic Drugs and what they are used for
Definition
– Delayed release
– Used for extended release or depot preparations
Term
What do Weak Acid or Weak Bases affect?
Definition
– Affects rate of release at site of absorption
Term
What are the 2 sub categories of Physicochemical Parameters of Dosage Form?
Definition
• Type of Delivery System
• Excipients Used
Term
What are the types of Delivery Systems?
Definition
– Immediate release or Extended Release
– Transdermal, oral
Term
List some excipients
Definition
– Disintegrants
– Fillers
– Lubricants
– Polymers
Term
For the Role of Excipients disintegrating agents are generally used to promote ________ of oral solid dosage forms in order to release the ________ ___________
Definition
disintegration, active ingredients
Term
For the Role of Excipients Diluents play a very important role in tablet ________, _________, _________ and biopharmaceutical properties of tablets.
Definition
hardness, disintegration, dissolution
Term
Under the same _______ force, tablets made of a same active ingredient but with different diluents have _______ ________
Definition
Compressional, different hardness.
Term
If the same tablets were made by different starches, the dissolution rate profile is ....
Definition
signifigantly varied
Term
Hardness of a tablet varies based on the ...
Definition
diluent used
Term
Disintegration time of a tablet varies based on the ...
Definition
diluent used
Term
Lubricants such as magnesium stearate ______the dissolution of drug
Definition
decrease
Term
Polymers used in preparation of matrix based systems change the release profile of drugs based on ...
Definition
type of polymer used
Term
Hydrophilic polymers are used for ...
Definition
immediate release
Term
hydrophobic are used for ...
Definition
extended release
Term
Polymers used in coating process also change ...
Definition
release profiles
Term
Film coating polymers _____ the release of a drug for extended periods of time
Definition
retard
Term
Presence of food in the stomach can______ the release of drug
Definition
retard
Term
Enteric coated tablets release the contents only at the pH of the ...
Definition
small intestine
Term
pH sensitive liposomes undergo a pH induced fusion with _________ _________and directly release the liposomal content to the ________
Definition
endosomal membrane , cytosol
Term
These liposomes are stable at physiological pH and undergo degradation or deformation at _____ pH.
Definition
acidic
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