The purpose of this study is to evaluate the effectiveness and safety of azilsartan medoxomil compared to placebo, once daily (QD), in African-American participants with essential hypertension.
Hypertension affects approximately 50 million individuals in the United States. As the population ages, the prevalence of hypertension will continue to increase if broad and effective preventive measures are not implemented. According to the World Health Organization, hypertension is the most common attributable cause of preventable death in developed nations, as uncontrolled hypertension greatly increases the risk of cardiovascular disease, cerebrovascular disease, and renal failure. Despite the availability of antihypertensive treatments, hypertension remains inadequately controlled; only about one third of patients continue to maintain control successfully. A major component of blood pressure regulation is the renin-angiotensin-aldosterone system, a system of hormone-mediated feedback interactions that results in the relaxation or constriction of blood vessels in response to various stimuli. Angiotensin II, a polypeptide hormone, is formed from angiotensin I in a reaction catalyzed by angiotensin-converting enzyme as part of the renin-angiotensin-aldosterone system. Angiotensin II is the principal pressor agent of the renin-angiotensin-aldosterone system with a myriad of effects on the cardiovascular system and on electrolyte homeostasis. In the United States, a disproportionate number of African-Americans have hypertension compared to age-matched non-Hispanic Caucasians and Mexican Americans. Earlier onset and greater severity of hypertension in African-Americans contribute to greater target organ damage and may be a factor in shorter life expectancy in this population compared to Caucasian-Americans. Although genetic factors have been invoked to explain these racial differences, environmental factors probably play a more important role. Improved management of hypertension through both lifestyle intervention and pharmacotherapy, including combination therapy, are necessary to achieve target blood pressure in African Americans. Takeda Global Research \& Development Center, Inc. is developing TAK-491 (azilsartan medoxomil) to treat patients with essential hypertension. Azilsartan medoxomil is a prodrug that is hydrolyzed to the active moiety, TAK-536 (azilsartan), which is a selective antagonist of the angiotensin II type 1 receptor subtype. This study is being conducted to evaluate the effectiveness and safety of oral azilsartan medoxomil compared with placebo in African-American participants with essential hypertension. Participation in this study is anticipated to be approximately 10 weeks.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
413
Azilsartan medoxomil 40 mg, tablets, orally, once daily for up to 6 weeks.
Azilsartan medoxomil 80 mg, tablets, orally, once daily for up to 6 weeks.
Azilsartan medoxomil placebo-matching tablets, orally, once daily for up to 6 weeks.
Change From Baseline in the 24-hour Mean Systolic Blood Pressure Measured by Ambulatory Blood Pressure Monitoring.
The change in 24-hour mean systolic blood pressure measured at week 6 relative to baseline. Ambulatory blood pressure monitoring measures blood pressure at regular intervals throughout the day and night. The 24-hour mean is the average of all measurements recorded for 24 hours after dosing.
Time frame: Baseline and Week 6.
Change From Baseline in Mean Trough Clinic Sitting Systolic Blood Pressure
The change in mean trough clinic sitting systolic blood pressure measured at final visit or week 6 relative to baseline.
Time frame: Baseline and Week 6.
Change From Baseline in the 24-hour Mean Diastolic Blood Pressure Measured by Ambulatory Blood Pressure Monitoring.
The change in 24-hour mean diastolic blood pressure measured at week 6 relative to baseline. Ambulatory blood pressure monitoring measures blood pressure at regular intervals throughout the day and night. The 24-hour mean is the average of all measurements recorded for 24 hours after dosing.
Time frame: Baseline and Week 6.
Change From Baseline in Mean Trough Clinic Sitting Diastolic Blood Pressure
The change in mean trough clinic sitting diastolic blood pressure measured at final visit or week 6 relative to baseline.
Time frame: Baseline and Week 6.
Change From Baseline in Daytime (6am to 10 pm) Mean Systolic Blood Pressure Measured by Ambulatory Blood Pressure Monitoring.
The change in daytime (6am to 10pm) mean systolic blood pressure measured at week 6 relative to baseline. Ambulatory blood pressure monitoring measures blood pressure at regular intervals throughout the day and night. Daytime mean is the average of all measurements recorded between the hours of 6 am and 10 pm.
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...and 54 more locations
Time frame: Baseline and Week 6.
Change From Baseline in Daytime (6am to 10 pm) Mean Diastolic Blood Pressure Measured by Ambulatory Blood Pressure Monitoring.
The change in daytime (6am to 10pm) mean diastolic blood pressure measured at week 6 relative to baseline. Ambulatory blood pressure monitoring measures blood pressure at regular intervals throughout the day and night. Daytime mean is the average of all measurements recorded between the hours of 6 am and 10 pm.
Time frame: Baseline and Week 6.
Change From Baseline in the Nighttime (12 am to 6 am) Mean Systolic Blood Pressure Measured by Ambulatory Blood Pressure Monitoring.
The change in nighttime (12am to 6am) mean systolic blood pressure measured at week 6 relative to baseline. Ambulatory blood pressure monitoring measures blood pressure at regular intervals throughout the day and night. Nighttime mean is the average of all measurements recorded between the hours of 12 am and 6 am.
Time frame: Baseline and Week 6.
Change From Baseline in the Nighttime (12 am to 6 am) Mean Diastolic Blood Pressure Measured by Ambulatory Blood Pressure Monitoring.
The change in nighttime (12am to 6am) mean diastolic blood pressure measured at week 6 relative to baseline. Ambulatory blood pressure monitoring measures blood pressure at regular intervals throughout the day and night. Nighttime mean is the average of all measurements recorded between the hours of 12 am and 6 am.
Time frame: Baseline and Week 6.
Change From Baseline in the 12-hr Mean Systolic Blood Pressure Measured by Ambulatory Blood Pressure Monitoring.
The change in the 12-hour mean systolic blood pressure measured at week 6 relative to baseline. Ambulatory blood pressure monitoring measures blood pressure at regular intervals throughout the day and night. The 12-hour mean is the average of all measurements recorded in the first 12 hours after dosing.
Time frame: Baseline and Week 6.
Change From Baseline in the 12-hr Mean Diastolic Blood Pressure Measured by Ambulatory Blood Pressure Monitoring.
The change in the 12-hour mean diastolic blood pressure measured at week 6 relative to baseline. Ambulatory blood pressure monitoring measures blood pressure at regular intervals throughout the day and night. The 12-hour mean is the average of all measurements recorded in the first 12 hours after dosing.
Time frame: Baseline and Week 6.
Change From Baseline in the Trough (22-24-hr) Mean Systolic Blood Pressure Measured by Ambulatory Blood Pressure Monitoring.
The change in trough mean systolic blood pressure measured at week 6 relative to baseline. Ambulatory blood pressure monitoring measures blood pressure at regular intervals throughout the day and night. The trough mean is the average of all measurements recorded from 22 to 24 hours after dosing.
Time frame: Baseline and Week 6.
Change From Baseline in the Trough (22-24-hr) Mean Diastolic Blood Pressure Measured by Ambulatory Blood Pressure Monitoring.
The change in trough mean diastolic blood pressure measured at week 6 relative to baseline. Ambulatory blood pressure monitoring measures blood pressure at regular intervals throughout the day and night. The trough mean is the average of all measurements recorded from 22 to 24 hours after dosing.
Time frame: Baseline and Week 6.
Percentage of Participants Who Achieve a Clinic Systolic Blood Pressure Response, Defined as < 140 mm Hg and/or Reduction From Baseline ≥ 20 mm Hg
Percentage of participants who achieve a clinic systolic blood pressure response measured at week 6, defined as less than 140 mm Hg and/or reduction from baseline of greater than or equal to 20 mm Hg. Systolic blood pressure is the arithmetic mean of the 3 trough sitting systolic blood pressure measurements.
Time frame: Baseline and Week 6.
Percentage of Participants Who Achieve a Clinic Diastolic Blood Pressure Response, Defined as < 90 mm Hg and/or Reduction From Baseline ≥ 10 mm Hg
Percentage of participants who achieve a clinic diastolic blood pressure response measured at week 6, defined as less than 90 mm Hg and/or reduction from baseline of greater than or equal to 10 mm Hg. Diastolic blood pressure is the arithmetic mean of the 3 trough sitting diastolic blood pressure measurements.
Time frame: Baseline and Week 6.
Percentage of Participants Who Achieve Both a Clinic Diastolic and Systolic Blood Pressure Response
Percentage of participants who achieve both a clinic diastolic and systolic blood pressure response measured at week 6, defined as less than 90 mm Hg and/or reduction from baseline of greater than or equal to 10 mm Hg AND less than 140 mm Hg and/or reduction from baseline of greater than or equal to 20 mm Hg. Diastolic and systolic blood pressure is based on the arithmetic mean of the 3 sitting blood pressure measurements.
Time frame: Baseline and Week 6.