Buccal and Sublingual Drug Delivery Flashcards
Sublingual vs Buccal
Which is more permeable?
Sublingual
Sublingual vs Buccal
Which has rapid onset/bioavailability?
Sublingual
Sublingual vs Buccal
Which can provide sustained delivery?
Buccal
Sublingual vs Buccal
Which one does not provide good bioavailability?
Buccal
Sublingual vs Buccal
Which one has systemic delivery?
Both
Sublingual vs Buccal
Which one has local delivery?
Buccal
What are the three layers of the oral mucosa?
- Epithelial membrane
- Basement membrane
- Lamina propria
What is the function of the epithelial membrane?
Protection
Of the layers of the oral mucosa, which one is the innermost layer?
Basement membrane
Of the layers of the oral mucosa, which one is also known as the submucosa?
Lamina Propria
Describe the cell size of the epithelial membrane of the oral mucosa
Cell size increases + flattens as it goes from basal to superficial
Sublingual vs Buccal
Which has a thinner membrane?
Sublingual
What is special about the basal layer of the epithelial membrane of the oral mucosa?
Basal cell layer is mitotically active
What is the purpose of the basement layer of the epithelial membrane?
New cell production
What is the purpose of the Lamina Propria of the epithelial membrane?
Contains rich supply of blood vessels
What is the function of saliva?
- Protective film
2. Acts as an anti-adherent
What is found in saliva?
Mostly water
But also salts, proteins, and amylase
How much saliva is produced per day? When is more produced? Less?
1L per day following a circadian rhythm
Heavily reduced when sleeping
Reduced in morning
Increased in afternoon
Increase when stimulated
For systemic delivery, what is the main drug transport pathway?
Paracellular
What is a permeability enhancer?
A chemical that REVERISBILY reduces the resistance of the barrier to drug penetration without permanently damaging any viable cells
What are some common permeability enhancer groups?
- FA
- Bile salts
- Surfactants
What does CO2 do with permeability?
Increases it
EX: effervescent fentanyl tabs
What kind of bonds do mucoadhesions form?
Secondary non-covalent bonds
What kind of mucoadhesion materials should be found?
- Hydrophilic
2. Lots of hydroxyl, carboxyl, and amine groups
What kind of bonds form weaker adhesives?
Non-ionic
What are the two kinds of FDA approved adhesives?
Cationic + Anionic