Adherence rates are important. They point to the ability of people to take their medication and improve or maintain their health. As we have seen poor adherence rates are by and large driven by the high cost of prescription drugs. The more drugs cost, the less often or less regularly people are to take them. That’s a major potential health hazard and for the public a potentially large bill, if the person ends up in hospital. Not surprisingly good adherence rates are linked to drug affordability.