This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Sirolimus is administered by which route? 
Select and explain. 
A. Oral, B. Inhalation, C. Intranasal, D. Intravenous
A: Oral
Answer: A: Oral 
Explanation: Sirolimus is available only as an oral drug. Its half-life is about 60 hours, while that of everolimus is around 43 hours. Ref: Katzung 11th edition Chapter 61.