5 Written questions
5 Matching questions
- what are the four types of bases used to make ointment?
- What is a tincture?
- which type of water is best for preparing parenteral solutions?
- Define: Levigation
- Water soluble bases are made from this important compound:
- a 1. water washable bases
2. Oleaginous/hydrocarbon/oil bases
- b Tincture is an alcoholic or hydroalcoholic solution of chemicals or soluble constituents of vegetable drugs.
Tinctures must be keep away from light and heat
- c Adding an insoluble substance to a powder while its wet is called levigation
- d Poly Ethylene Glycol (PEG)
- e water for injection USP
5 Multiple choice questions
- Ans: the difference is the dispersed phase/continuous phase
dispersed phase comes first
Water-oil: dispersed phase is water.
Oil-water: dispersed phase is oil
- Opposite of osmosis using high pressure to move from region of high solvent concentration to region of low solvent concentration.
- equal amounts of oil, water, acacia
- multiple OH groups in alcohols
sorbitol and glycerin
- water-oil emulsion with 25% water
5 True/False questions
what is the use of emulsifying agents? → Opposite of osmosis using high pressure to move from region of high solvent concentration to region of low solvent concentration.
what is the bottle method of emulsification and what is it's ratio? → Its a variation of dry gum: oil:water:acacia
3;2;1 or 2:1;1
which of the following types of water CANNOT be used for making injections?
a) sterile water for inhalation
b) bacteristatic water USP
c) water for injection USP
d) sterile water for irrigation USP → Ans: A and C
Note that only water for injection and bacteristatic water may be used
what is the difference between wet gum and dry gum method of making emulsions? → wet gum= adding water to acacia
dry gum = adding oil to acacia
Sorbic Acid and glycerin is an important component of? → Poly Ethylene Glycol (PEG)