Final Exam Flashcards
Emollient
An agent that softens the skin or
soothes irritation in skin or mucous
membrane
Protective
A substance that protects injured or exposed skin surfaces from harmful
or annoying stimuli
cream
-semisolid
-water removable bases
ointment
-semisolid
-external
-hydrocarbon base
Hydrocarbon or oleaginous
bases on skin
-inexpensive
-non-reactive
-good emollient, protective, and occulsive
-not water washable
-greasy
Vaseline
hydrocarbon base
Anhydrous Absorption bases
-contain an emulsifier that form water-in-oil emulsion when water is added
-aquaphor
water in oil emulsion
-an absorption base that contains water(amount depens on the base)
-Eucerin
Advantages of absorption bases
-moderately good protective, occlusive, and
emollient properties
-don’t wash off easy
-absorb liquids
-some lanolin
Disadvantages of absorption bases
-poor patient acceptance
-greasy, hard to remove
-may be sensitizing(wool wax)
-stability issues
water removable bases
-o/w AKA cream
-microcrystalline dispersions of
long chain fatty acids or
alcohols in water.
-Vanicream
Advantages of water removable base
-nongreasy
-can absorb some water or alcohol
-will allow dissipation of fluid
Disadvagtes of water removable base
-less protective
-compatibility issues
-stability issues
-dry out
Gels
-irritating
-no emollient properties
-PEG bases
Levigation
-incorporate solid into an ointment base
When not to use levigation
-very fine particle size
-quantity to incorporate is small
-ointment base is soft
-final product is to be a stiff ointment or base
Coal tar levigating agent
-Tween 80
Levigation agennt for Peruvian Balsam
castor oil
Levigating agent for Ichthammol
-glycerin
Dissolution
dissolving a solid
ingredient in a solvent or oil and subsequent
incorporation of the solution into the ointment
base is the preferred treatment.
Common gelling agents
-X-cellulose
-sodium alginate
-xanthan gum
-gelatin
-alginic acid
-more
Clumping
-when the solid doesn’t incorporate with the oil
-glycerin can help prevent
Neutralizers
-adjust the pH after gelling agent has been wetted in the medium
-sodium hydroxide and triethanolamine
What gels can be ingested?
-Carbopol® 934P
-methylcellulose
-hydroxypropylmethylcellulose
-sodium carboxymethylcellulose