Which of the following is NOT an example of enteric medication routes?

Enteric medication routes refer to ways of administering drugs that involve the gastrointestinal system, primarily aiming for oral absorption. This typically includes routes that allow medication to enter the digestive tract, such as oral administration, and can also include rectal administration as it involves the absorption of drugs in the lower gastrointestinal tract.

Sublingual and buccal routes involve placing the medication under the tongue or in the cheek pouch, respectively, which allows for rapid absorption into the bloodstream through the mucous membranes, utilizing the enteral route of administration.

Rectal administration, while somewhat distinct from traditional oral routes, is still considered an enteric route because it involves drug absorption via the gastrointestinal tract.

Intravenous administration, however, introduces medication directly into the bloodstream, bypassing the gastrointestinal system entirely. This route is associated with rapid systemic effects and is typically used when oral administration is not feasible due to factors such as vomiting, unconsciousness, or when immediate action of the medication is required.

Given this context, identifying intravenous administration as not being an enteric route is based on understanding the fundamental differences between how medications are absorbed and the systems involved in these various routes.