Derm Flashcards
Ointment Properties:
Advantages
Hydrates
Removes Scales
Greatest bioavailability of active ingredient
Ointment Properties:
Disadvantages
Greasy
Ointment Properties:
Preferred Area of Use
smooth skin w/ short or sparse hair
4 main properties of Ointments
- occlusive
- Humectant
- Emollient
- Protective
What does occlusive mean? (in terms of ointments)
promoting retention of water in the skin
creates hydrophobic barrier that prevents moisture in the skin from evaporating
What does humectant mean? (in terms of ointments)
causes water to be retained b/c of hygroscopic properties (aka attracts water)
what does emollient mean? (in terms of ointments)
softens skin/soothes irritation
4 classes of Ointments
- hydrocarbon
- absorption
- water-removable
- water-soluble
Creams/Lotions are ointment bases of the ____________ class
water removable
T or F: Creams are more hydrating than ointments
FALSE
Advantage of a Cream
- good cosmetic appearance/high pt acceptance
Lotions/Solns/Sprays can be easy applied to ________ areas/_______
hairy; scalp
Disadvantages of Lotions/Solns/Sprays
DRYING; Lower bioavailability
Advantages of Gels
- Non greasy
- good for hairy areas
- high pt acceptance
Disadvantages of Gels
drying
Oleganious Bases:
absorb water - yes or no?
No! (they do NOT absorb water)
Oleganious Bases:
water washable - yes or no?
No! (they are NOT water washable)
Examples of Oleganious Bases
WHITE PETROLATUM
vaseline/plastibase
Absorption Bases:
absorb water - yes or no?
Yes! (like several times its weight in water)
Absorption Bases:
water washable - yes or no?
Nope