Skip to content

Prospective, randomized, open-label, clinical trial comparing the effects of losartan (regular dose) /hydrochlorothiazide combination and losartan alone (high-dose) on blood pressure, endothelial function and markers for obesity/oxidative stress/chronic kidney diseases

Prospective, randomized, open-label, clinical trial comparing the effects of losartan (regular dose) /hydrochlorothiazide combination and losartan alone (high-dose) on blood pressure, endothelial function and markers for obesity/oxidative stress/chronic kidney diseases - Prospective, randomized, open-label, clinical trial comparing the effects of losartan/hydrochlorothiazide combination and losartan alone

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
JPRN
Registry ID
JPRN-UMIN000002961
Enrollment
30
Registered
2010-01-03
Start date
2010-01-01
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Hypertension

Interventions

Administration of losartan (standard dose)/hydrochlorothiazide combination Administration of losartan alone (high-dose)

Sponsors

National Defense Medical College
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1) Hypertensive patients whose blood pressures did not reach the levels recommended by Hypertension Guidelines 2009 of Japanese Association of Hypertension, even when administered standard doses of angiotensin receptor blokers. 2) Outpatients 3) Subjects who gave written informed consent

Exclusion criteria

Exclusion criteria: 1)Allergy against losartan/hydrochlorothiazide 2)Poor-controlled hypertension (DBP>110 mmHg) 3)Poor-controlled diabetes (HbA1c>8.0 %) 4)Secondary hypertension 5)History of stroke, acute coronary syndrome or any cardiovascular diseases needed for inpatient-treatments within 6 months 6)Either level of aspartate aminotransaminase or alanine aminotransferase exceeds three-fold of the normal limits. 7)End stage renal disease 8)Symptomatic (NYHA III or IV) congestive heart failure 9)Malignancies or other diseases with poor prognosis 10)Pregnant 11)Subjects whose doctor in charge do not agree to join the trial

Design outcomes

Primary

MeasureTime frame
Blood pressure (Office/Home monitoring) Flow-mediated vasodilation in forearm Heparin-releasable EC-SOD levels Twelve and Twenty four weeks after administration

Secondary

MeasureTime frame
Markers indicating obesity (e.g. adiponectin), inflammation (high sensitive CRP), oxidative stress (8-OHdG/ MDA-LDL), early-staged kidney diseases (microalbuminuria) Twelve weeks and Twenty four after administration

Countries

Japan

Contacts

Public ContactMakoto Ayaori

National Defense Medical College Department of Internal Medicine I

ayaori@ndmc.ac.jp04-2995-1597

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026