20 Questions
What is the typical size range of droplets in emulsions?
0.1 – 100 μm
What is the main advantage of using emulsions in oral administration of oils and oil-soluble drugs?
Enhanced palatability
What is the main characteristic of o/w emulsions in terms of miscibility?
Miscible with water
What determines the type of emulsion formed by an emulsifying agent?
Solubility of the emulsifying agent
What is the ideal property of an emulsifying agent in terms of toxicity?
Non-toxic
What is the primary function of tragacanth in emulsions?
To increase viscosity and prevent creaming
Which type of emulsifying agent is suitable for internal preparations due to its non-toxic and non-irritant properties?
Non-ionic emulsifying agent
What is the primary reason for choosing an emulsifying agent?
Based on the active ingredient and use of the product
Which of the following emulsifying agents is suitable for parenteral use?
Polysorbate 80
What is the purpose of flavouring agents in polysorbate emulsions?
To mask the unpleasant taste of the emulsion
What is the primary reason why acacia is not used externally in emulsions?
It is too sticky
What is the purpose of antimicrobial preservatives in emulsions?
To prevent the growth of bacteria in the water phase
What happens when the interfacial film of an emulsion is broken?
Cracking occurs
What is the effect of increasing the chain length of macrogols?
It becomes a liquid with good solvent properties
What is the primary characteristic of vegetable oils used in skin preparations?
They are occlusive
What is the characteristic of silicone oils?
Very hydrophobic and water repellent
What is the composition of hydrous wool fat?
7 parts wool fat and 3 parts water
What is the purpose of surfactants in ointments?
To allow them to be washed off easily
At what temperature are oily components melted in the preparation of creams?
60°C
When are unstable and insoluble drugs added to creams?
By trituration after the mixture has cooled
Learn about the formulation of emulsions and ointments in pharmaceuticals, including the importance of emulsifying agents and the benefits of using emulsions for oral, rectal, and topical administration. Understand how emulsions can enhance palatability and increase absorption of oil and oil-soluble drugs.
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