What are the two main routes of drug administration?

The response identifying enteral and parenteral as the two main routes of drug administration is accurate. These classifications broadly categorize how medications are delivered into the body.

Enteral routes involve administering drugs through the gastrointestinal tract. This includes oral consumption, where medications are taken by mouth, and other methods like sublingual (under the tongue) or rectal administration. The enteral route relies on the body's digestive system to absorb the medication, which can influence the onset and duration of effects.

On the other hand, parenteral routes involve any administration that bypasses the gastrointestinal tract, primarily through injection. This may include intravenous (directly into the bloodstream), intramuscular (into muscle tissue), and subcutaneous (under the skin) methods. Parenteral administration allows for rapid absorption and immediate effects, making it essential in emergency situations.

While the other choices focus on specific administration methods, they do not encompass the broader categories that enteral and parenteral represent, which is fundamental for understanding pharmaceutical treatments and their implications in various medical situations.