Which route of medication administration is characterized by placing medication under the tongue?

The route of medication administration characterized by placing medication under the tongue is the sublingual route. This method allows for rapid absorption of the medication directly into the bloodstream through the rich supply of blood vessels in that area. Medications administered sublingually can bypass the digestive system and the first-pass metabolism in the liver, leading to quicker onset of action.

In contrast, other routes of administration serve different purposes. The buccal route involves placing medication between the gums and the inner lining of the cheek, which also allows for systemic absorption but is distinct from the sublingual route. The otic route is specifically for medications instilled into the ear, often used for treating ear infections or conditions, and has no relation to sublingual placement. The intravenous route involves administering medication directly into the bloodstream through a vein, providing immediate effects but requiring different techniques and equipment. Thus, the sublingual route is uniquely positioned for its quick absorption method and specific placement under the tongue.