The purpose of this study is to investigate the efficacy and safety of a fixed-dose combination of perindopril 5 mg /indapamide 1.25 mg / amlodipine 5 mg compared to the free combination of the same components (perindopril 4 mg / indapamide 1.25 mg in a single pill and amlodipine 5 mg pill given separately at the same time) in chinese patients with uncontrolled essential hypertension.

Main Inclusion Criteria:

• Men or women of Asian origin
• ≥18 years old
• Treated for essential hypertension
• Having the day of the selection visit an uncontrolled hypertension treated with any anti-hypertensive monotherapy at maximal dose or any dual therapy at starting dose according to investigator's routine practice or at least 1 month prior to the visit
• Having at the selection visit a sitting SBP≥140 and <180 mmHg and DBP≥90 and <110 mmHg

Main Exclusion Criteria:

• Known or suspected symptomatic orthostatic hypotension or positive orthostatic test at the selection visit
• Treatment with more than 2 antihypertensive drugs or with 2 antihypertensive drugs at the highest doses at the selection visit

Qualified scientific and medical researchers can request access to anonymized patient-level and study-level clinical trial data.

Access can be requested for all interventional clinical studies:

• used for Marketing Authorization (MA) of medicines and new indications approved after 1st January 2014 in the European Economic Area (EEA) or the United States (US).
• where Servier is the Marketing Authorization Holder (MAH). The date of the first MA of the new medicine (or the new indication) in one of the EEA Member States will be considered for this scope.

In addition, access can be requested for all interventional clinical studies in patients:

• sponsored by Servier
• with a first patient enrolled as of 1 January 2004 onwards
• for New Chemical Entity or New Biological Entity (new pharmaceutical form excluded) for which development has been terminated before any Marketing authorization (MA) approval.

After Marketing Authorisation in EEA or US if the study is used for the approval.

Researchers should register on Servier Data Portal and fill in the research proposal form. This form in four parts should be fully documented. The Research Proposal Form will not be reviewed until all mandatory fields are completed.