Well Slap Me And Call Me Philip K. Dick

I just had an idea for a story in which someone invents a drug to combat cold and flu symptoms that's also a somewhat addictive euphoric.  One of the side effects of the drug is that it reveals to everyone else in the world who the person on it is and that person's psychological and intellectual make-up.  The situation inspires certain people to torture, persecute and kill by proxy those on the drug who are intelligent and good, while leaving alone those elements on the drug who engage in antisocial, undesirable and criminal behavior so that the drug develops a bad reputation among those factions in society who would see it prohibited -- the prohibitionists of course also having the motive of wanting to enrich themselves via the systems that arrest, prosecute and incarcerate those who either purvey the drug or use it.