Tess takes Prozac because she's always been depressed; Julia takes it because she doesn't know who she is; when Sam takes the drug it makes him feel better than well.
Since this antidepressant drug was first introduced in 1988 over ten million people have taken it, making it the most popular psychiatric drug in history. Small wonder when such astounding claims are being made for it: that it can transform pessimists into optimists, turn loners into extroverts, improve business acumen and emotional resilience - in short, that it can fundamentally alter personality. But if personality can be shaped by chemicals, then serious questions must be asked about the nature of the self.
This remarkable account of the extraordinary phenomenon that is Prozac is a provocative contribution to the debate facing medicine's changing agenda.