The drug was not without its flaws. Arren still remembered the result of the investigation of the drug in the novel. It didn't reveal a lot, but he got the general idea of it and informed Spade.
They used it as a reference to bravely execute their plan. There were risks, but in exchange for capturing some of the members of the organization, even if they were the lowest members without enough authority, capturing some of them was already enough.
The Old Order was extremely adept in the matter of drugs and their research with the pheromones themselves, which, if Arren could recall Rave's parents, had made great contributions in this particular aspect for the organization.
Although they only wanted to treat Rave's condition at that time. It was still recorded and became the basis of their experiments throughout the years.