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HypertensionPhase 4NCT03946514

Efficacy and Safety of a Single-pill Fixed Combination of Sufficient Losartan/Hydrochlorothiazide in Chinese Hypertensive Patients

A Phase 4 study testing losartan/hydrochlorothiazide and amlodipine/hydrochlorothiazide in people with Hypertension, run by Shanghai Jiao Tong University School of Medicine at 1 site in China.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

1. Study name: Efficacy and safety of a single-pill fixed combination of sufficient losartan/hydrochlorothiazide in Chinese hypertensive patients (FOCUS) 2. Medicine: Losartan 100 mg/hydrochlorothiazide 25 mg single-pill fixed combination; amlodipine besylate tablet (5 mg/tablet); hydrochlorothiazide tablets (25… Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Hypertension
What is being tested?
losartan/hydrochlorothiazide and amlodipine/hydrochlorothiazide
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
180 participants
Where
1 siteChina
Study dates
1 Sep 2018to 31 Aug 2024
Phase
Phase 4
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Men or Women aged between 18 years will be screened, who should never take antihypertensive drugs or stop antihypertensive drugs for more than 2 weeks with systolic blood pressure of 140-179 mmHg and / or diastolic blood pressure of 90-109 mmHg or who is on monotherapy for at least 2 weeks with systolic blood pressure of 140-179 mmHg and / or diastolic blood pressure of 90-109 mmHg will be screened. Before randomization, two visits should be performed and 6 clinic blood pressures should be recorded. The average of the 6 clinic blood pressures should be 140-179 mmHg in systolic and/or 90-109 mmHg in diastolic. Regardless of whether the office blood pressure meets the enrollment conditions, a one-week home blood pressure measurement should be performed before randomization. Patient should sign the written consent form before screening and be able to go to the clinic by him/herself.

Who cannot join

  • suspected or confirmed secondary hypertension; history of coronary heart disease, myocardial infarction, heart failure, stroke or dementia; taking other drugs that might affect blood pressure; liver dysfunction, serum creatinine ≥1.5 mg/dL (133 μmol/L), urine protein positive; serum potassium >5.5 mmol/L or <3.5 mmol/L; history of gout or serum uric acid ≥420 μmol/L for man and ≥360 μmol/L for women; elderly care patients; or patients who are participating in other clinical trials.

Trial locations and contacts

1 site in 1 country.

China1 site
  • Shanghai Institite of Hypertension, Ruijin Hospital, Shanghai Jiaotong University School of Medicine

    Shanghai, 200025

Other trials in China

About this study

Official title: Efficacy and Safety of a Single-pill Fixed Combination of Sufficient Losartan/Hydrochlorothiazide in Chinese Hypertensive Patients (FOCUS)

  1. Study name: Efficacy and safety of a single-pill fixed combination of sufficient losartan/hydrochlorothiazide in Chinese hypertensive patients (FOCUS)
  2. Medicine: Losartan 100 mg/hydrochlorothiazide 25 mg single-pill fixed combination; amlodipine besylate tablet (5 mg/tablet); hydrochlorothiazide tablets (25 mg/tablet)
  3. Rationale: Angiotensin-converting enzyme inhibitor (ACEI) or angiotensin receptor blocker (ARB) combined with thiazide diuretic (DIU), which is the preferred combination for most hypertension guidelines. However, the efficacy and safety of losartan 100 mg/hydrochlorothiazide 25 mg single-pill fixed combination evaluated by ambulatory blood pressure are still lack of clinical evidence.
  4. Objective: To evaluate the efficacy and safety of losartan 100 mg/hydrochlorothiazide 25 mg fixed combination for ambulatory blood pressure after 8 weeks therapy in patients over 18 years with grade 1 or 2 hypertension either newly diagnosed or with blood pressure not controlled with monotherapy.
  5. Study design: This study is a multi-center, randomized and controlled clinical trial with two equally sized treatment groups: losartan/hydrochlorothiazide single-pill fixed combination and amlodipine/hydrochlorothiazide.
  6. Study population: Men and Women aged over 18 years (n=180) meeting the inclusion/exclusion criteria.
  7. Randomization and treatment: Patients should receive a 24-hour ambulatory blood pressure monitoring measurement before randomization. After stratification by centers, eligible patients will be randomly divided into two groups, taking losartan 100 mg/hydrochlorothiazide 25 mg fixed combination once a day or amlodipine besylate tablets (5 mg/tablet) + hydrochlorothiazide tablets (25 mg/tablet) once a day.
  8. Follow up: 8 weeks.
  9. Sample size: a total of 180 patients should be enrolled in the combination.
  10. Timeline: After obtaining the approval of Ethics Committee of Ruijin Hospital in September 2018, recruitment will start. Patients enrollment will be performed between October 2018 to August 2024. All patients should be followed up before August 2024.
Read the detailed description
  1. Study name: Efficacy and safety of a single-pill fixed combination of sufficient losartan/hydrochlorothiazide in Chinese hypertensive patients (FOCUS)
  2. Medicine: Losartan 100 mg/hydrochlorothiazide 25 mg single-pill fixed combination; amlodipine besylate tablet (5 mg/tablet); hydrochlorothiazide tablets (25 mg/tablet)
  3. Rationale: Angiotensin-converting enzyme inhibitor (ACEI) or angiotensin receptor blocker (ARB) combined with thiazide diuretic (DIU), which is the preferred combination for most hypertension guidelines. However, the efficacy and safety of losartan 100 mg/hydrochlorothiazide 25 mg single-pill fixed combination evaluated by ambulatory blood pressure are still lack of clinical evidence, especially randomized controlled clinical trials with ambulatory or home blood pressure monitoring as the main evaluation method.
  4. Objective The primary objective is to evaluate the efficacy and safety of losartan 100 mg/hydrochlorothiazide 25 mg fixed combination for ambulatory blood pressure after 8 weeks therapy in patients over 18 years with grade 1 or 2 hypertension either newly diagnosed or with blood pressure not controlled with monotherapy. The secondary objective are to compare the 24-hour, daytime, night-time, home and office systolic and diastolic blood pressure between the losartan 100 mg/hydrochlorothiazide 25 mg group and the amlodipine besylate 5 mg/hydrochlorothiazide 25 mg group after 8 weeks of antihypertensive treatment; to compare the changes in blood glucose, blood lipids, blood electrolytes, serum creatinine, blood uric acid and other biochemical parameters.
  5. Study design: This study is a multi-center, randomized and controlled clinical trial with two equally sized treatment groups: losartan 100 mg/hydrochlorothiazide 25 mg single-pill combination group and amlodipine besylate 5 mg+hydrochlorothiazide 25 mg group.
  6. Study population: Men or Women aged over 18 years (n=180) will be screened, who should never take antihypertensive drugs or stop antihypertensive drugs for more than 2 weeks with systolic blood pressure of 140-179 mmHg and / or diastolic blood pressure of 90-109 mmHg or who is on monotherapy for at least 2 weeks with systolic blood pressure of 140-179 mmHg and / or diastolic blood pressure of 90-109 mmHg will be screened. Before randomization, two visits should be performed and 6 clinic blood pressures should be recorded. The average of the 6 clinic blood pressures should be 140-179 mmHg in systolic and/or 90-109 mmHg in diastolic. Regardless of whether the office blood pressure meets the enrollment conditions, a one-week home blood pressure measurement should be performed before randomization. Patient should sign the written consent form before screening and be able to go to the clinic by him/herself. Exclusion criteria included: suspected or confirmed secondary hypertension; history of coronary heart disease, myocardial infarction, heart failure, stroke or dementia; taking other drugs that might affect blood pressure; liver dysfunction, serum creatinine ≥1.5 mg/dL (133 μmol/L), urine protein positive; serum potassium >5.5 mmol/L or <3.5 mmol/L; history of gout or serum uric acid ≥420 μmol/L for man and ≥360 μmol/L for women; elderly care patients; or patients who are participating in other clinical trials.
  7. Randomization and treatment: Patients should receive a 24-hour ambulatory blood pressure monitoring measurement before randomization. After stratification by centers, eligible patients will be randomly divided into two groups, taking losartan 100 mg/hydrochlorothiazide 25 mg fixed combination once a day or amlodipine besylate tablets (5 mg/tablet) + hydrochlorothiazide tablets (25 mg/tablet) once a day.
  8. Follow up: Sitting office blood pressures should measured by an OMRON device. Medical history should be recorded. Clinical examinations including ambulatory blood pressure, home blood pressure, electrocardiogram, blood and urine routine tests and biochemical tests should be performed. During the 4-week follow-up visit, office blood pressures, serum electrolyte should be measure, adverse events and medication assignment should be recorded. A one-week home blood pressure measurements should be performed immediately before the follow-up visit. During the 8-week follow-up visit, clinical examinations similar with baseline including ambulatory blood pressure, home blood pressure, electrocardiogram, blood and urine routine tests and biochemical tests should be performed.
  9. Sample size and statistical analysis: At least 90 eligible patients should be enrolled in each group, and a total of 180 patients should be enrolled in total. Data will be analyzed by using the SAS software. T-tests will be used to compare the parameters between groups and the difference between the two groups with the calculation of 95% confidence interval. In addition, a covariance analysis will also be used in the analysis of baseline parameters.
  10. Timeline: After obtaining the approval of Ethics Committee of Ruijin Hospital in September 2018, recruitment will start. Patients enrollment will be performed between October 2018 to August 2024. All patients should be followed up before August 2024. Database construction and statistical analysis will be conducted at the same time, appropriate domestic and international conferences will be selected to publish the research results. The main results will be published in international professional medical journals.
  11. Organization: The Centre for Epidemiological Studies and Clinical Trials, Ruijin Hospital, Shanghai, China.
Conditions
Hypertension
Being tested
losartan/hydrochlorothiazide, amlodipine/hydrochlorothiazide
Keywords
Blood pressure, single-pill fixed combination, losartan/hydrochlorothiazide, amlodipine/hydrochlorothiazide
Medical subject headings
Hypertension

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • losartan/hydrochlorothiazideDrug

    losartan 100 mg/hydrochlorothiazide 25 mg single-pill combination

  • amlodipine/hydrochlorothiazideDrug

    amlodipine besylate tablets (5 mg / tablet) + hydrochlorothiazide tablets (25 mg / tablet)

Study groups in NCT03946514
Study groupRoleWhat they receive
losartan/hydrochlorothiazide groupExperimentalNot described
Receives: Drug: losartan/hydrochlorothiazide
amlodipine/hydrochlorothiazide groupActive comparatorNot described
Receives: Drug: amlodipine/hydrochlorothiazide

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Adverse events

    Number of participants with treatment-related adverse events at the end of 8 weeks of follow-up

    Measured: 8 weeks

  2. Blood pressure control rate

    The blood pressure controlled rate after 8 weeks of treatment

    Measured: 8 weeks

Secondary outcomes (1)
  1. Ambulatory blood pressure change

    The changes of ambulatory blood pressure between two treatment groups after 8 weeks of treatment

    Measured: 8 weeks

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted10 May 2019
  2. Study start1 Sep 2018
  3. Primary completion31 Aug 2024
  4. Study completion31 Aug 2024

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Model description
Eligible patients will be randomly divided into two groups, taking losartan 100 mg/hydrochlorothiazide 25 mg fixed combination once a day or amlodipine besylate tablets (5 mg/tablet) + hydrochlorothiazide tablets (25 mg/tablet) once a day.
Masking
None (open label)
Enrolment
180 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03946514
Sponsor's protocol ID
FOCUS
Status last verified
Mar 2025
First submitted
5 May 2019
Last updated
30 Mar 2025
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No

Questions about this trial

What is this clinical trial studying?

A Phase 4 study testing losartan/hydrochlorothiazide and amlodipine/hydrochlorothiazide in people with Hypertension, run by Shanghai Jiao Tong University School of Medicine at 1 site in China.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 30 Mar 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in China. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Adverse events (time frame: 8 weeks). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 30 Mar 2025.

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