The medication adherence of patients using widely prescribed beta blockers (Atenolol and Metoprolol) in their extended and immediate release salt form remains unidentified. Improving medication adherence has been shown to reduce health care costs. Analyzing the treatment having maximum medication adherence could reduce overall healthcare costs, offsetting the cost of the medication itself. The objectives of this study are to 1) compare the medication adherence of patients prescribed with Atenolol and Metoprolol in both immediate and extended release forms 2) determine the difference in healthcare expenditure between those highly adherent to the beta-blockers under study.