Saf

It is an important part of Andorian Shelthreth, its also became an addition drug during the Dominion War, Phillipa Mathias and Julian Bashir, had gain permission to bring it to Deep Space 9

On Andor
The semi-illegal saf being transported by Matthias, that she pickup at an underground market stall, a pharmacy, in which a prescription is need.

Later on it is stolen, and used on Charivretha.