Which of the following describes enteral drug administration?

Enteral drug administration refers to the delivery of medications via the digestive system. This method includes routes that utilize the gastrointestinal tract, which allows for the drug to be absorbed directly into the bloodstream after being processed by the digestive organs. The most common forms of enteral administration are oral (by mouth), sublingual (under the tongue), and rectal (via the rectum).

Oral administration is the most widely used, as it is convenient and usually safe, while sublingual and rectal methods can be employed in cases where oral administration is not feasible or practical.

While the other options mention various routes of administration, they do not encompass the full range of enteral administration. For instance, intravenous and intramuscular methods involve injecting medications directly into the bloodstream or muscle, which are parenteral routes, not enteral. The focus solely on oral administration overlooks other valid routes like sublingual and rectal. Lastly, intranasal methods are also categorized under parenteral routes because they bypass the gastrointestinal tract altogether. Hence, the correct answer encompasses the broader spectrum of enteral routes, which includes oral, sublingual, and rectal methods.