Final answer:
The enteral route of drug administration that is good for patients experiencing nausea and vomiting or who are unconscious is the parenteral route.
Step-by-step explanation:
The enteral route of drug administration that is good in the presence of nausea and vomiting or, if the patient is unconscious, is the parenteral route. The parenteral route involves administering the drug through methods such as intravenous or intramuscular injection, bypassing the gastrointestinal tract. This route is preferred when a drug is not easily absorbed in the GI tract or when a patient cannot take oral medications due to illness.