Final answer:
Parenteral medications are sterile preparations that contain water with one or more dissolved compounds.
Step-by-step explanation:
The true statement regarding parenteral medications is option 4: Parenteral medications are sterile preparations that contain water with one or more dissolved compounds. Parenteral medications are administered through routes other than through the gastrointestinal tract, such as intravenous or intramuscular injection. These medications are typically used when the drug is not easily absorbed in the GI tract or when immediate effects are required.