Pharmacy Technician Certification Exam Practice Question

Correct Answer: D

Rationale: Intravenous administration delivers medications directly into the bloodstream, resulting in an immediate onset of action. This rapid effect necessitates careful monitoring to prevent adverse reactions or overdose.

Intramuscular and subcutaneous routes have slower absorption rates, allowing for more gradual effects and greater margin for error. Rectal administration can also vary in absorption speed but is generally less immediate than intravenous. Thus, while all routes require caution, intravenous administration demands the highest vigilance due to its rapid action and potential for serious consequences.