Final answer:
The available routes of administration for acetaminophen are oral, intravenous, and rectal. It's critical to adhere to recommended dosages to prevent liver damage.
Step-by-step explanation:
The available routes of administration for acetaminophen, which is an analgesic and antipyretic medication, are oral, intravenous, and rectal. Acetaminophen is not commonly administered via topical or intramuscular routes. Oral administration is the most common and convenient for home use; intravenous administration offers rapid drug delivery and is often used in healthcare settings; rectal administration may be used when oral administration is not feasible or appropriate. It's essential to follow the correct dosage, especially for different formulations like infants' or children's pain formulas, to avoid the risk of liver damage, particularly in individuals who consume three or more alcoholic beverages a day.