This is a long-term prospective, observational post-marketing surveillance study of azilsartan medoxomil/chlorthalidone FDC in participants with essential hypertension. The study will assess the safety and effectiveness of azilsartan medoxomil/chlorthalidone FDC prescribed as a monotherapy or taken concomitantly with other anti-hypertension therapies in participants whose blood pressure is not properly controlled by azilsartan medoxomil monotherapy or who require administration of multiple drugs in order to reach the target blood pressure in routine clinical settings.

The study will enroll and will consider approximately 600 participants. These participants will be grouped with the ones treated with azilsartan medoximil monotherpy. The data will be prospectively collected, at the centers from medical files and recorded into electronic case report forms (e-CRFs). All the participants will be assigned to a single observational

Participants With Essential Hypertension

The multi-center study will be conducted in South Korea. Data collection will be based on routinely scheduled and emergency visits over the surveillance period, scheduled at Visit 1 (Baseline), Visit 2 (6 weeks), Visit 3 (at least 3 months to 6 months) and Visit 4 (6 months or more up to 9 months) after drug administration. The overall duration of the study will be approximately 5 years. All participants will be followed up for 9 months after drug administration.