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What is a liquid suspension?

  1. Liquid drug form in which the drug is evenly dissolved

  2. Contains small amounts of drug in separate balls that dissolve over time

  3. Softening and soothing, especially of the skin

  4. Liquid drug form with drug particles settling to the bottom

The correct answer is: Liquid drug form with drug particles settling to the bottom

A liquid suspension, such as in the case of choice D, is a type of liquid drug form where the drug particles are not completely dissolved and instead settle to the bottom of the liquid. This characteristic differentiates it from a solution where the drug is completely dissolved evenly throughout the liquid. Liquid suspensions require shaking before administration to ensure an even distribution of the medication. Choices A, B, and C do not accurately describe a liquid suspension. Choice A describes a solution, where the drug is evenly dissolved in the liquid. Choice B refers to a sustained-release formulation where small amounts of the drug dissolve over time. Choice C relates to the properties of a topical cream or ointment, indicating softening and soothing effects on the skin, rather than the characteristics of a liquid suspension.