Clozapine is the most effective treatment for people with treatmentresistant schizophrenia (Conley and Buchanan, 1997; Kane et al., 1988). Unfortunately, clozapine's efficacy is tempered by potentially fatal adverse drug reactions (ADRs) which require regular blood monitoring. Concerns about these ADRs, in particular neutropenia and agranulocytosis, led to clozapine being restricted to prescribing by psychiatrists and dispensing by pharmacists in hospitals.