Zyme

"A vial of zyme, brewed up in some basement lab."

- Deus Ex description Zyme (name literally meaning "a ferment") is a synthetic drug that appeared in the 2050s in the USA. It quickly spread throughout the crisis-torn society and is considered a serious threat to public welfare. It is theorized to be the cause of an outbreak of mental illness. Washington D.C. considers introducing a zero-tolerance policy against recreational use of zyme. A zyme dealer named Rock is encountered in the Mole People tunnels under Battery Park.

In Deus Ex, the player is offered a job to rob a Zyme stash in a bakery in Paris by mafia members. While the mafia members will offer credits for the zyme stolen from the bakery, they will actually pay for any and all zyme in the player's inventory. As a result, a player that has been saving zyme all game will have an opportunity to cash in after the job. However, since you can only carry up to 20 vials of Zyme at once, you can earn a maximum of 1,300 credits (65 credits per vial, if you get Renault to increase the price by refusing him once).

Using zyme will induce a "drunk" effect similar to consuming several servings of alcohol at once.

Zyme seems to have addictive properties, at least in some users.

Post-collapse greasel trainers utilize zyme to increase the aggressiveness of their pupils.