Drug therapy is growing more complex as patients increasingly suffer from a number of co-morbidities. Accordingly, in clinical medicine, a wide range of medication related problems may arise (1). A medication related problem (MRP) is defined as "an event or circumstance involving drug therapy that actually or potentially interferes with desired health outcomes" (2). These problems have been found to lead to more hospital admissions and thus increase the cost of healthcare provision (3, 4). For instance, Winterstein et al. carried out a meta-analysis of research in this area which showed that 7.1% of hospital admissions were attributable to a drug related problem, of which 59% appeared avoidable (5). Moreover, a large study in the United Kingdom showed that these admissions cost the National Health Service (NHS) up to £466 million annually, which is 0.59% of the British health care budget (6).