The development of new inhaled asthma therapies commonly entails rigor
ous testing of both pharmaceuticals and the technical characteristics
of the various devices to be used. However, the patient - the final cu
stomer - is the vital human factor in the decision whether the drug is
used or not. Despite enormous financial and intellectual investment i
n new therapies, this human factor is often overlooked, and patient co
mpliance remains a problem. It is essential that doctors are aware of
this 'human factor' if optimal patient self-management is to be achiev
ed.