Adherence refers to a process, in which the appropriate person’s behaviour, taking medication , following a diet, and/or executing lifestyle changes, is decided after a proper discussion with the patient. Compliance is defined as “the extent to which the patient’s behaviour matches the prescriber’s recommendations” Though compliance has been frequently employed to describe medication-taking behaviour, it has proved problematic because it refers to a process where the clinician decides on a suitable treatment, which the patient is expected to comply with unquestioningly. Studies over the past few decades have emphasized the importance of patients’ perspectives in medication-taking, based on their own beliefs, their personal circumstances, the information and resources available for them.