Which term describes a liquid medication that contains suspended particles requiring shaking before use?

The term that accurately describes a liquid medication containing suspended particles that need to be shaken before use is "suspension." In a suspension, solid particles are dispersed throughout a liquid but are not dissolved; thus, they may settle at the bottom over time. Shaking the suspension before administration ensures that the medication is evenly distributed, providing the correct dose.

In contrast, a syrup is a solution of sugar in water that may contain active ingredients, but it does not involve suspended particles needing to be mixed before use. An elixir is typically a clear, sweetened solution containing alcohol and is generally homogenous, meaning that it doesn't require shaking. Liquid medications is a broad category that encompasses various forms of medications, but it does not specifically indicate the need for shaking like a suspension does.