Which formulation is typically intended for insertion?

Suppositories are specifically designed for insertion into body cavities, such as the rectum or vaginal canal. They are formulated to melt or dissolve at body temperature, allowing the medication to be absorbed through the mucous membranes. This route of administration can be particularly beneficial for delivering medications when oral intake is not feasible, such as in patients who are vomiting or unable to swallow.

In contrast, tablets and lozenges are primarily intended for oral use; tablets are swallowed and dissolve in the digestive tract, while lozenges are meant to dissolve slowly in the mouth for localized effects in the throat or mouth. Ointments are typically used for topical application on the skin, targeting surface-level conditions rather than being inserted into body cavities. Thus, the intended use and formulation characteristics solidly affirm that suppositories are the appropriate choice for insertion.