The Antidote Serum, created by Stephanie Powell, was a reverse-engineered form of the Trilsettum Serum. Stephanie first created this serum for Joshua(The Watcher). She designed this serum to be able to counteract the effects of the Trilsettum Serum without the user having a severe withdrawal. According to Stephanie, the Antidote would "act as a beta-blocker which should keep your [Joshua] organs from degenerating."