The most dangerous route of drug administration is injection.

Intravenous injection (IV)

Explanation:

 Injectable medication administration should be performed efficiently, safely and responsibly, in order to achieve the goals of the implemented therapy. Most drugs can be administered by a variety of routes. The choice of the appropriate route in a given situation depends on both the drug and patient-related factors.

   Intravenous (IV): should be administered slowly for several hours into one of the superficial veins and with monitoring of the patient's reactions. The drug reaches the bloodstream directly and the effects are produced immediately. Once a drug is injected, there is no way to withdraw it. It is the most dangerous route and vital organs such as the heart, brain, etc., are exposed to high concentrations of the drug.

what are the choices?