Gannarian narco-spice was a valuable spice variety. In 3 ABY, two kilos of the substance were enough to make someone wealthy for the rest of their life. It went by the street name "sniff". Lando Calrissian improvised being a drug smuggler on Hockaleg and gave a stormtrooper searching the Millennium Falcon a bag of "sniff" (actually slime yeast from the Falcon's galley) to keep the ship from being searched while Princess Leia Organa, Luke Skywalker, Chewbacca, C-3PO and R2-D2 infiltrated the Tarkin superweapon orbiting overhead.