Abstract
To valuate whether angiotensin converting enzyme (ACE) gene insertion/deletion (I/D) polymorphism and aldosterone synthase (CYP11B2) gene −344T/C polymorphism are associated with individual response to hydrochlorothiazide (HCTZ) in the Han Chinese population with essential hypertension. We enrolled 829 mild/moderate hypertensive patients and 12.5mg of HCTZ was given daily. After 6 weeks, the results showed that the ACE I/D polymorphism, not the CYP11B2 − 344T/C polymorphism, was associated with systolic blood pressure (SBP) response to HCTZ (P = 0.009) in the Han Chinese population with essential hypertension, with no interaction.