Final Exam (Written) Flashcards
Liquid preparation containing 1 or more drug substances molecularly dispersed n a suitable solvent
Solution
Usually aqueous, may contain other co-solvents like alcohol
Topical solutions
Concentrated aqueous preparations of sugar or sugar substitutes with or without flavoring agents
Syrups
Clear, sweet, hydroalcoholic solutions that are usually flavored. Usually insoluble in water alone, but are soluble in water-alcohol mixtures
Elixirs
Most common vehicles for oral solutions (alone or in combination) (4)
Water, ethanol, glycerin, syrups
Solution packaging (4)
Glass or plastic, light resistant containers
- Squeeze bottles
- Applicator or dropper bottles
- Amber vials
- Opaque cream/ointment jar
One definite rule when choosing package sizing
Always use the smallest package that will hold the preparation
Oral liquid storage
Room temperature or refrigerated
Syrups storage
Refrigerated
Two-phased system consisting of a finely divided solid dispersed in a solid, liquid, or gas
Suspension
When is it appropriate to make a suspension?
When the drugs are not sufficiently soluble in a solvent
Suspension routs of administration (6)
Oral, topical, opthalmic, otic, nasal, rectal
Composition of suspension (5)
Insoluble particles (API) Liquid medium (vehicle) Suspending agents/surfactants Preservatives Flavors/sweeteners
Suspension storage
Room temperature or refrigerated
Suspension labeling (4)
Shake well - ALWAYS
Internal/external use
Storage
BUD
General BUD for oral suspensions at cold temperature
<14 days
General BUD for topical suspension preperations
<30 days
Thermodynamically unstable mixtures of two essentially immiscible liquids with an emulsifying agent to hold them together
Emulsion
Emulsions consist of (3)
Dispersed phase: internal phase
Dispersion medium: external phase
Emulsifying agent
Oil-in-water emulsion phase distinctions (o/w)
Dispersed phase (internal) = oil Dispersion medium (external) = water
O/W emulsion characteristics of product (5)
Internal or external use, soluble in water, water washable, non-occlusive, non-greasy
Water-in-oil emulsion phase distinctions (w/o)
Dispersed phase (internal) = water Dispersion medium (external) = oil
W/O emulsion characteristics of product (5)
External use only, insoluble in water, not water washable, occlusive, greasy
External use emulsion examples (2)
Cream, lotions
Three components of emulsions
Lipid phase
Aqueous phase
Emulsifier
Example of emulsifiers (4)
Acacia
Agar
Pectin
Gelatin
Ratios of oil:water:emulsifier in Wet Gum (English) and Dry Gum (Continental) methods of emulsions
2-4 : 2 : 1
Difference in preparation of Wet Gum vs. Dry Gum methods
Wet gum:
- Add emulsifier
- Add WATER and triturate until uniform
- Add OIL in small quantities and triturate
- Triturate until creamy, white, and crackling sound occurs
* Typically more stable*
Dry Gum:
- Add emulsifier (gum)
- Add OIL and triturate until uniform
- Add WATER all at once and rapidly triturate
- Triturate until creamy white and crackling sound occurs
API of a w/o emulsion base
API is typically oil or insoluble powder