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A comparison of a combination drug of an angiotensin II receptor antagonist and a low-dose diuretic vs combination therapy with an angiotensin II receptor antagonist and a calcium channel blocker in hypertensive patients with metabolic syndrome

A comparison of a combination drug of an angiotensin II receptor antagonist and a low-dose diuretic vs combination therapy with an angiotensin II receptor antagonist and a calcium channel blocker in hypertensive patients with metabolic syndrome - CATCH (Combination of Antihypertensive Treatment in Chiba)

Status
Unknown
Phases
Phase 4
Study type
Interventional
Source
JPRN
Registry ID
JPRN-UMIN000001238
Enrollment
200
Registered
2008-07-10
Start date
2007-10-01
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 with metabolic syndrome

Interventions

Sponsors

Hypertension in Metabolic syndrome CHIBA (HMS-CHIBA) Study group
Lead Sponsor

Eligibility

Sex/Gender
Male

Inclusion criteria

Inclusion criteria: Inclusion criteria: 1) Patients who met diagnostic criteria for definite or probable metabolic syndrome 2) Patients with essential hypertension, who have been previously treated with monotherapy of an ARB or a calcium channel blocker for more than 3 months, however, whose blood pressure has not been adequately controlled (systolic blood pressure >140 mmHg and/or diastolic blood pressure >90mmHg) 3) Men and women aged 20 to 80 years at the time of the first visit. 4) Outpatients 5) Patients who fully understand the study procedures explained to them using explanatory notes and have given written informed consent to participate in the study

Exclusion criteria

Exclusion criteria: Exclusion criteria: 1) Patients with uncontrolled hypertension (diastolic blood pressure ≥ 110mmHg) 2) Patients with malignant hypertension 3) Patients with uncontrolled diabetes (HbA1c ≥8.0%) 4) Patients with uncontrolled hypertriglyceridemia (TG ≥400mg/dL) 5) Patients who have stroke, AMI and/or critical vascular complications that required hospitalization within 6 months prior to the intervention 6) Patients with liver dysfunction [GPT(ALT) over three times the normal value] 7) Patients with renal failure (serum creatinine ≥2.0 mg/dL) 8) Patients with a previous history of gout attack or uncontrolled hyperuricemia (≥8.0mg/dL) 9) Patients under treatment with insulin 10) Pregnant or breast feeding female patients, including one trying to conceive pregnancy during the planned study period 11) Patients with uncontrolled arhythmia 12) Patients with severe valvular disease including mitral stenosis and incompetence of aortic valve 13) Patients with cardiac insufficiency (NYHA grade III or IV) 14) Patients with a history of hypersensitivity to ingredients of losartan potassium 15) Patients with a history of hypersensitivity to thiazide or thiazide-like diuretics 16) Patients with a history of hypersensitivity to ingredients of dihydropyridines 17) Patients who are considered not eligible for the study by the attending doctor due to medical reasons

Design outcomes

Primary

MeasureTime frame
Change in systolic blood pressure after 12 weeks of treatment

Secondary

MeasureTime frame
- Change and % change in blood pressure after 12 and 24 weeks of treatment (excluding change in systolic blood pressure after 12 weeks of treatment) - Change and % change in Adiponectin, 8OHdG, HOMA-R, microalbuminuria, hs-CRP after 12 and 24 weeks of treatment - Safety throughout the treatment period - For other laboratory test values, exploratory analysis is to be conducted to analyze variations within a group and/or between two groups.

Countries

Japan

Contacts

Public ContactIchiro Tatsuno / Hideki Hanaoka

Graduate School of Medicine, Chiba University Clinical Cell Biology and Medicine

ichiro-tatsuno@faculty.chiba-u.jp043-226-2092

Outcome results

None listed

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