Which pairing correctly describes how medications are dispersed and how shaking helps?

• A. Solution; suspension
• B. Suspension; solution
• C. Liquid; Gas
• D. Gas; Liquid

Answer: (A)

Medications come in two common liquid forms: solutions and suspensions. In a solution, the drug is dissolved in the solvent and is uniformly distributed—there’s nothing to settle, so shaking isn’t needed to change the dispersion. In a suspension, the drug particles aren’t dissolved; they’re dispersed but can settle to the bottom over time. Shaking helps to re-disperse those settled particles so the dose is uniform again.

So the best pairing here uses solution to describe how the medication is dispersed (uniformly dissolved) and suspension to describe how shaking helps (re-suspending the particles if it’s in suspension). The other pairings imply incorrect relationships, such as shaking turning a solution into something else or referencing states (gas) that don’t fit typical liquid medication dispersion.