Adherence to treatment in post-acute coronary syndrome patients has been found to be poor in several studies. Pharmacists play a significant role in enhancing medication adherence and reducing rates of mortality and re-admission to hospital by performing medication reconciliation and tailoring, and patient education. The purpose of this study is to determine the effect of pharmacist-delivered multifaceted intervention on medication adherence and clinical outcomes of post-acute coronary syndrome patients. The study will be designed as a randomised controlled trial with blinded outcome assessors. The population includes patients who survive during hospitalisation with discharge diagnosis of acute coronary syndrome. Pharmacist-delivered multifaceted intervention consists of two counselling sessions within 1 week before and after hospital discharge including medication reconciliation and tailoring, and support with pill organiser and drug information leaflet. Primary outcome measure is the proportion of patients adherent to medication at 1 month after discharge. Secondary outcome measures are the proportions of patients (1) adherent to medication at 3 months after discharge, (2) readmitted to hospital and (3) dying within 3 months after discharge. The investigators also measure (4) the change in quality of life and (5) beliefs about medicines from baseline at 3 months.