An Ampule is the name given to a type of beverage, presumably alcoholic, as those underage are not allowed them.
The Chimæra, a large popular nightclub on Lorien, sold Ampules are so Sandor, being underage, was not legally allowed inside. Another nightclub, called Kora, did not sell Ampules and therefore allowed underage citizens to enter.
What is referred to as an ampule, on Earth, is a small glass capsule containing a liquid which is usually used in medicine. The liquid is usually a measured quantity of medicine ready for injection. It is unknown if a Loric Ampule has any similiar properties.