Which dosage form is specifically administered by inserting into a body orifice?

The correct answer, suppository, is a dosage form specifically designed to be inserted into a body orifice, such as the rectum or vagina. Suppositories take advantage of the body's natural absorption capabilities through these orifices, allowing for localized treatment or systemic effects without needing oral ingestion. They are designed to dissolve or melt at body temperature, releasing their active ingredients for absorption.

Tablets, while they can be swallowed and sometimes even crushed or split, are not designed to be inserted into body orifices. Gels, on the other hand, are usually topical preparations applied to the skin or mucous membranes, rather than inserted into the body. Injectables are administered via a needle, typically into muscle or subcutaneously, and do not involve direct insertion into a body orifice in the same manner as suppositories. Therefore, the use of suppositories is distinct and specifically suitable for this method of administration.