Antihypertensive prescriptions over a 10-year period in a large Chinese population.

International guidelines recommending antihypertensive prescriptions for the management of hypertension have been published in the past decade. Beta-blocker use was discouraged by a significant body of evidence and angiotensin-converting enzyme inhibitors (ACEIs) or angiotensin receptor blockers (ARBs) were found more effective among younger patients. This study aims to evaluate the trends in prescription profiles in a large Chinese population because patterns of antihypertensive agent dispensation represent important information for physicians and policymakers. From clinical databases consisting of all patient records in the public health-care system of Hong Kong, we examined all antihypertensive prescriptions according to the drug classes (thiazide diuretics, alpha-blockers, beta-blockers, calcium channel blockers (CCBs), ACEIs, ARBs, fixed-dose combinations, and polytherapy (2, 3)) between 2001 and 2010. We retrieved > 6.3 million prescription episodes for 223,287 patients. The average age of the patients was 59.9 years (SD 17.6), and 54.8% were women. According to prescription episodes, the most commonly prescribed medications were beta-blockers (31.7%) and CCBs (29.2%), followed by ACEIs (13.9%), thiazide diuretics (5.0%), and alpha-blockers (4.5%). Between 2001 and 2010, the prescription proportions of beta-blockers decreased from 41.5% to 21.5%, whereas that of ARBs increased from 0.5% to 1.0% (P < 0.001, (2) test for trend). It was found that the decline of beta-blockers (71.0% to 35.4%) and increase in ARB prescriptions (0.4% to 1.0%) were particularly marked among younger subjects aged < 55 years. These findings provided information on the prescription patterns of antihypertensive agents in a large Chinese population. It sets a future research direction to study the various reasons influencing these drug classspecific trends.