2- drug administration Flashcards
Factors for orally administered drugs
Physiochemical interactions
Gi motility
Gi microflora
Mucosal dysfunction
Best time to use oral drugs
Low molec weight
Lipid soluable
Acid resist
Liver metabolisim resist
Advantages of oral meds
Easy to administer
Non invasive
May be reversible
Characteristics of subcutaneous or su dermal injection
Good but slow absorption
Can be irritating
Inject over shoulders/neck
Solutions, suspensions, or solid formulations
What physical-chemical properties enhance absorption
Small
Lipophilic
uncharged
Advantages for transdermal
Constant rate of delivery
Simple
Characteristics of IV
Preferred for large volumes
No absorption - 100% bioavailability
Allows precise control of plasma drug level
Particulate solutions only