This document discusses medication adherence and factors that influence a patient's compliance. It defines medication adherence as a patient following their provider's recommendations on timing, dosage, and frequency of medication. Non-adherence can be caused by socioeconomic factors, healthcare system issues, therapy complexity, a patient's condition, or individual patient factors. The document outlines the pharmacist's role in educating patients and monitoring adherence through direct methods like drug testing or indirect methods like patient surveys. Pharmacists can improve adherence by simplifying regimens, addressing side effects, and enhancing patient-provider communication.