In order for patients to derive benefit from their medications they have to adhere to the prescribed treatment regimen. In an ideal world dispensed medications for chronic conditions are taken by the patient exactly as prescribed. Sadly, doctors' orders are not always followed for a variety of complex reasons including such factors as the emergence of side effects, length of treatment, the frequency of dosing and severity of the disease to name just a few. As a result medication non-adherence is one of the most serious problems in health care and poses a significant financial drain on the health care system.