Final answer:
The most rapidly acting medication administration route is intravenous (IV) administration. For treating a systemic infection at home, the most appropriate and convenient route of administration would be oral.
Step-by-step explanation:
The most rapidly acting medication administration route is intravenous (IV) administration.
When a drug is administered intravenously, the plasma levels achieved are substantially higher compared to oral or intramuscular administration.
For treating a systemic infection at home, the most appropriate and convenient route of administration would be oral.