Validation of Medication Non-adherence Model (UK)

Inclusion Criteria: * Patients with chronic disease between 18 -89 years old. * Chronic medication use (\> 3 medications; excluding analgesic, ointment and eye drop medication) * Patients registered with a given Pharmacy at least 1 year before entering into the study. Exclusion Criteria: * Patients who are illiterate in English. * Patients who are unable to give consent to the study. * Enrolled in another clinical trial, which requires change in their routinely medication. * Patients currently using automatic medication reminder services (excluding the pharmacy service). * Patients with dementia or any other mental conditions, that might affects the accuracy of the answers provided.