HypertensionNCT00617877
Antihypertensive Response to Losartan and Genetic Polymorphisms
A study testing losartan potassium and Comparator: Hydrochlorothiazide in people with Hypertension, run by Merck Sharp & Dohme LLC.
Trial summary
The purpose of this study is to evaluate the antihypertensive response of treatment with losartan with reference to genetic polymorphisms. Read more about this study
- Who is it for?
- Ages 18 to 60 years
- Conditions the study is for
- Hypertension
- What is being tested?
- losartan potassium and Comparator: Hydrochlorothiazide
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 800 participants
- Where
- No sites listed yet
- Study dates
- Mar 2005to Jun 2009
- Phase
- Interventional
- 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 to 60 years
- All sexes
- No healthy volunteers
- Adult
Who may be able to join
- Both gender less than 60 years old, with mild-moderate hypertension (SBP greater than and DBP equal or greater than 90 mmhg, BP < 180/110)
- Never treated for hypertension or who have taken antihypertensive agents sporadically (not more than 15 days total therapy) but not in the 30 days prior to the first visit
- Patient in therapeutic wash out for 6 months
- Patient is asymptomatic, absence of significant concomitant diseases, except for non-familial hypercholesterolemia, absence of systemic diseases
- Women with menopause not treated with hormone replacement therapy or women of reproductive age who do not make use of estro-progestagen agents but who use another safe contraceptive method
- BMI < 30 for men and < 28 for women
Who cannot join
- Secondary or malignant hypertension, Na <130 mmol/l, K >5,5 mmol/l, or < 3,0 mmol/l
- Cardiac disease such as ischemic, HF, arrhythmia, cardiac surgery
- Pregnant, breast feeding
- History of nephropathy, metabolic disease, liver disease
- Alcohol or drug abuse
- History of angioedema
- Has a known hypersensibility to study drug(s)
About this study
Official title: Pharmacogenetic of the Antihypertensive Response to the Angiotensin II Blockers in Monotherapy or Associated to Hydrochlorothiazide
The purpose of this study is to evaluate the antihypertensive response of treatment with losartan with reference to genetic polymorphisms.
- Conditions
- Hypertension
- Being tested
- losartan potassium, Comparator: 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 potassiumDrug
Losartan 50 mg/day for 4 weeks, then doubled to losartan 100 mg/day (in case of BP more than 140/90 mm Hg.) Continued until the end of the study (visit 9-week 48).
Comparator: HydrochlorothiazideDrug
Hydrochlorothiazide 25 mg will be added at week 8 if BP is more than 140/90 mm Hg. This last regimen will be continued until the end of the study (visit 9-week 48).
| Study group | Role | What they receive |
|---|---|---|
| 1 | Experimental | Losartan 50 mg/day for 4 weeks, then doubled to losartan 100 mg/day in case of BP more than 140/90 mm Hg. HCTZ 25 mg will be added at week 8 if BP is more than 140/90 mm Hg. This last regimen will be continued until the end of the study (visit 9-week 48). Receives: Drug: losartan potassium; Drug: Comparator: Hydrochlorothiazide |
What is being measured
The primary outcome is the main question the study is designed to answer.
Blood pressure reduction with reference to genetic polymorphisms.
Measured: Over 1 Year
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted18 Feb 2008 (estimated)
- Study startMar 2005
- Primary completionJun 2009
- Study completionJun 2009
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for HypertensionStudies of the same condition, open and under way.
- More trials run by Merck Sharp & Dohme LLCThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
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 N/A
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 800 participants (actual)
Sponsor and investigators
- Lead sponsor
- Merck Sharp & Dohme LLC
- Sponsor type
- Industry (pharma, biotech, devices)
- Investigators
- Medical Monitor, Study director, Merck Sharp & Dohme LLC
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00617877
- Sponsor's protocol ID
- 2007_035
- Other IDs
- MK0954-334
- Status last verified
- Jul 2009
- First submitted
- 5 Feb 2008
- Last updated
- 22 Jul 2009
- Results posted
- No
Study at a glance
From the registry record, last updated by the sponsor on 22 Jul 2009. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Pharmacogenetic of the Antihypertensive Response to the Angiotensin II Blockers in Monotherapy or Associated to Hydrochlorothiazide
- ClinicalTrials.gov ID
- NCT00617877
- Acronym / sponsor ID
- 2007_035
- Conditions
- Hypertension
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 800 participants (actual)
- Lead sponsor
- Merck Sharp & Dohme LLCIndustry (pharma, biotech, devices)
- Study start
- Mar 2005
- Primary completion
- Jun 2009 (actual)
- Study completion
- Jun 2009 (actual)
- First posted
- 18 Feb 2008 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The purpose of this study is to evaluate the antihypertensive response of treatment with losartan with reference to genetic polymorphisms.
Study design
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| 1 | Experimental | Drug: losartan potassium, Drug: Comparator: HydrochlorothiazideLosartan 50 mg/day for 4 weeks, then doubled to losartan 100 mg/day in case of BP more than 140/90 mm Hg. HCTZ 25 mg will be added at week 8 if BP is more than 140/90 mm Hg. This last regimen will be continued until the end of the study (visit 9-week 48). |
Who may qualify
- Ages
- 18 to 60 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult
Key inclusion criteria (6 listed)
- Both gender less than 60 years old, with mild-moderate hypertension (SBP greater than and DBP equal or greater than 90 mmhg, BP < 180/110)
- Never treated for hypertension or who have taken antihypertensive agents sporadically (not more than 15 days total therapy) but not in the 30 days prior to the first visit
- Patient in therapeutic wash out for 6 months
- Patient is asymptomatic, absence of significant concomitant diseases, except for non-familial hypercholesterolemia, absence of systemic diseases
- Women with menopause not treated with hormone replacement therapy or women of reproductive age who do not make use of estro-progestagen agents but who use another safe contraceptive method
Key exclusion criteria (7 listed)
- Secondary or malignant hypertension, Na <130 mmol/l, K >5,5 mmol/l, or < 3,0 mmol/l
- Cardiac disease such as ischemic, HF, arrhythmia, cardiac surgery
- Pregnant, breast feeding
- History of nephropathy, metabolic disease, liver disease
- Alcohol or drug abuse
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| losartan potassiumLosartan 50 mg/day for 4 weeks, then doubled to losartan 100 mg/day (in case of BP more than 140/90 mm Hg.) Continued until the end of the study (visit 9-week 48). | Drug | 1 |
| Comparator: HydrochlorothiazideHydrochlorothiazide 25 mg will be added at week 8 if BP is more than 140/90 mm Hg. This last regimen will be continued until the end of the study (visit 9-week 48). | Drug | 1 |
Primary outcome
Blood pressure reduction with reference to genetic polymorphisms.
Time frame: Over 1 Year
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 22 Jul 2009.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Medical Monitor study director
Merck Sharp & Dohme LLC
Questions about this trial
What is this clinical trial studying?
A study testing losartan potassium and Comparator: Hydrochlorothiazide in people with Hypertension, run by Merck Sharp & Dohme LLC.
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 6 inclusion and 7 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 22 Jul 2009. Status can change between updates, so confirm with the study contact before making plans.
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.
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?
Blood pressure reduction with reference to genetic polymorphisms. (time frame: Over 1 Year). 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 22 Jul 2009.