Emulsion: Definition, Advantages, Disadvantages – Pharmaceutics Notes>
An emulsion is a thermodynamically unstable system consisting of at least two immiscible liquid phases one of which is dispersed as globules in the other liquid phase stabilized by a third substance called an emulsifying agent
An emulsion is a dispersion in which the dispersed phase is composed of small globules of a liquid distributed throughout a vehicle in which it is immiscible
Advantages and disadvantages of emulsions
Unpalatable oils can be administered in a palatable form.
Unpalatable oil-soluble drugs can be administered in a palatable form.
The aqueous phase is easily flavoured.
The oily sensation is easily removed.
The rate of absorption is increased.
It is possible to include two incompatible ingredients, one in each phase of the emulsion.
Preparation needs to be shaken well before use.
A measuring device is needed for administration.
A degree of technical accuracy is needed to measure a dose.
Storage conditions may affect stability.
Bulky, difficult to transport and prone to container breakages.
Liable to microbial contamination which can lead to cracking.
Biphasic Liquids: Suspension: Definition, advantages, and disadvantages, Classifications, Preparation of suspensions, Flocculated and Deflocculated suspension Emulsions: Definition, Advantages & Disadvantages, Classification, Emulsifying agent, Test for the identification of the type of Emulsion, Methods of preparation, Stability of emulsion
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