What does the term 'suspension' refer to in pharmacy?

The term 'suspension' in pharmacy specifically refers to a mixture in which solid particles are dispersed throughout a liquid but are not dissolved. This is a crucial concept because suspensions are commonly used for delivering medications, especially when the active ingredients are not soluble in the liquid medium. In a suspension, the particles can settle to the bottom over time, which is why it is essential for patients to shake the medication before use to ensure even distribution of the drug.

The other options provided do not accurately represent the definition of a suspension. A sweetened alcohol solution describes a different type of formulation, typically a syrup. A drug insert for body cavities indicates a specific method of drug delivery rather than a physical state of a mixture. A thick medication for skin application refers more to ointments or creams, which are also distinct from suspensions. Understanding these distinctions helps clarify the role and characteristics of suspensions in pharmaceutical practice.