Which dosage form is a liquid preparation in which drug substances are dissolved or dispersed in a suitable emulsion medium?

• A. Injectable Emulsion
• B. Injectable Suspension
• C. Powder for Injection
• D. Injection

Answer: (A)

An injectable emulsion is a liquid parenteral preparation in which a drug is dissolved or dispersed in an emulsion medium. Emulsions consist of two immiscible liquids stabilized by an emulsifier, with one liquid forming droplets within the other. This form is especially used for lipophilic drugs that don’t dissolve well in water, allowing them to be administered by injection in a stable, sterile emulsion.

The other options don’t fit this description: an injectable suspension contains solid drug particles dispersed in liquid rather than droplets in an emulsion; a powder for injection is a dry solid to be reconstituted before use; a plain injection refers to a simple solution or suspension without the emulsion system.