WEEK 6 Flashcards
What are the 4 types of bases used in ointments?
Hydrocarbon bases
Absorption bases
Water-miscible bases
Water-soluble bases
T or F
Ointments with hydrocarbon bases are not absorbed by the skin
T
T or F
Hydrocarbon bases are easier to apply/spread than absorption bases.
F
Name the 2 types of absorption bases
Non-emulsified and emulsified
What ingredient distinguishes non-emulsified ointments to emulsified ointments?
Emulsified ointments have water in them, whereas non-emulsified ointments do not.
T or F
Water-miscible bases are classified into five categories based on the surfactant they contain
F
three categories
Why are water-miscible ointments easier to wash off than absorption bases?
Whilst water-miscible ointments don’t contain any water, their emulsifying nature enables them to mix readily with aqueous secretions of the skin and be easier to wash off.
Name the 3 types of water-miscible base ointments
Anionic, cationic and non-ionic surfactants
Which type of water-miscible base ointment is compatible with most medications?
non-ionic surfactants
T or F
Creams are more emollient and less occlusive than ointments.
T
T or F
The main difference between creams and ointments is the amount of water.
T
What are the 2 main types of creams?
Oil-in-water (O/W) emulsions (aqueous creams) and water-in-oil (W/O) emulsions (oily creams)
Which type of cream is preferred for oral liquid emulsions?
Oil-in-water because the water phase is much more pleasant to taste than the oil phase
T or F
(regarding creams)
The ratio of the two phases (oil and water) indicates the type of emulsion.
F
the oil phase can be a higher percentage than the water phase in both O/W and W/O creams.
T or F
The emulsifying agent in oily creams are oil soluble
T
