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CompletedNCT00957554I-ADDUpdated Oct 26, 2010

Irbesartan/Amlodipine in Hypertensive Patients Uncontrolled on Irbesartan 150 mg Monotherapy

A Phase 3 interventional study of irbesartan/amlodipine and irbesartan in Hypertension, sponsored by Sanofi. Completed at 38 sites in 8 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2010-10-26.

Sponsored by Sanofi · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
435
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

Primary Objective:

To demonstrate that the antihypertensive efficacy of the fixed combination irbesartan/amlodipine 300/5 mg is superior to that of irbesartan 300 mg monotherapy in lowering systolic blood pressure (SBP) as measured by home blood pressure measurement (HBPM) after 10 weeks of treatment (W10)

Secondary Objective:

  • To compare the antihypertensive efficacy of the fixed combination irbesartan/amlodipine 300/5 mg with that of irbesartan 300 mg monotherapy after 10 weeks of treatment (W10)
  • To compare the antihypertensive efficacy of the fixed combination therapy irbesartan/amlodipine 150/5 mg with that of irbesartan 150 mg monotherapy after 5 weeks of treatment (W5)
  • To examine in each treatment group the change from week 5 to week 10 in SBP and diastolic blood pressure (DBP) assessed by HBPM and by office blood pressure measurement (OBPM)
  • To determine the incidence and severity of adverse events
02

Conditions studied

  • Hypertension

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03

In context

Hypertension

6,689 studies on the registry are indexed under Hypertension; 965 are open to participants now.

This study's enrollment of 435 is above the median of 90 across 4,995 interventional studies indexed under Hypertension.

Browse Hypertension studies →

Lead sponsor

Sanofi is the lead sponsor of 1,508 studies on the registry; 90 are open to participants now.

Of its 198 completed or terminated interventional studies of FDA-regulated products, 118 (60%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Established essential hypertension
  • Treated with irbesartan 150 mg monotherapy for at least 4 weeks
  • With uncontrolled BP defined as mean SBP = or > 145 mmHg assessed by OBPM
  • Signed written inform consent obtained prior to inclusion in the study

Randomisation Criteria:

  • Mean SBP = or > 135 mmHg assessed by HBPM
  • Good compliance with the HBPM protocol defined as at least 12 correct measurements performed over the last 6 days of the first period of measurements
  • Creatinine clearance = or > 30 ml/min determined ny Cockroft formula

Exclusion criteria

Exclusion criteria:

  • Mean SBP = or > 180 mmHg and/or mean DBP = or > 110 mmHg measured at doctor's office at Visit 1
  • Known or suspected causes of secondary hypertension
  • Patients with bilateral artery stenosis, renal artery stenosis in a solitary kidney, renal transplant or only has one functioning kidney
  • Know contraindications or hypersensitivity to either amlodipine or irbesartan or to the combination or history of angioedema related to the administration of an angiotensin II receptor antagonist or any combination of the drugs used
  • Know type 1 diabetes
  • Know severe hepatic impairment alanine aminotransferase (ALT) or aspartate aminotransferase (AST) > 5 times the upper limit of normal or history of hepatic encephalopathy, esophageal varices, or portocaval shunt
  • Know severe renal impairment (creatinine clearance \< 30 ml/mn)
  • Concomitant use of any other antihypertensive treatment
  • Administration of any other investigational drug within 30 days before inclusion
  • Inability to obtain a valid automatic BP measurement recording
  • Presence of any severe medical or psychological condition that, in the opinion of the investigator, indicate that participation in the study is not in the best interest of of the patient
  • Presence of any other conditions (e.g.: geographical, social, etc) that would restrict or limit the patient participation for the duration of the study
  • Pregnant or breast feeding women
  • Women of childbearing potential unable or unwilling to use an acceptable method to avoid pregnancy for the entire study period

The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.

05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
435 participants (actual)

Study arms

  • Experimental
    irbesartan/amlodipine

    Before randomisation: irbesartan 150 mg for 7 to 10 days (common in the 2 arms) then After randomisation: irbesartan/amlodipine 150/5 mg fixed combination for 5 weeks followed by irbesartan/amlodipine 300/5 mg fixed combination for additional 5 weeks

    Drug: irbesartan/amlodipine

  • Active comparator
    irbesartan

    Before randomisation: irbesartan 150 mg for 7 to 10 days (common in the 2 arms) then After randomisation: irbesartan 150 mg for 5 weeks followed by irbesartan 300 mg for 5 additional weeks

    Drug: irbesartan

Interventions

  • Drugirbesartan/amlodipine

    Pharmaceutical form: 150/5 mg and 150/10 mg tablets (fixed combination) Route of administration: oral Dose regimen: 1 tablet once daily

  • Drugirbesartan

    Pharmaceutical form: 150 and 300 mg tablets Route of administration: oral Dose regimen: 1 tablet once daily

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What researchers measure

Primary outcomes

  1. Mean home systolic blood pressure

    Time frame: At randomisation and week 10

Secondary outcomes

  1. Mean office blood pressure

    Time frame: At randomisation, week 5 and week 10

  2. Mean home diastolic blood pressure

    Time frame: At randomisation, week 5 and week 10

07

Study locations

38 sites
  • Sanofi-Aventis Investigational Site Number 07605
    Belo Horizonte, 30150-221, Brazil
  • Sanofi-Aventis Investigational Site Number 07602
    Caxias do Sul, 95070-560, Brazil
  • Sanofi-Aventis Investigational Site Number 07604
    Maceió, 57051-500, Brazil
  • Sanofi-Aventis Investigational Site Number 07601
    Sorocaba, 18030-083, Brazil
  • Sanofi-Aventis Investigational Site Number 07603
    São José do Rio Preto, 15015-210, Brazil
  • Sanofi-Aventis Investigational Site Number 17001
    Barranquilla, Colombia
  • Sanofi-Aventis Investigational Site Number 17002
    Barranquilla, Colombia
  • Sanofi-Aventis Investigational Site Number 17003
    Cartagena, Colombia
  • Sanofi-Aventis Investigational Site Number 32001
    Guatemala, Guatemala
  • Sanofi-Aventis Investigational Site Number 32002
    Guatemala, Guatemala
  • Sanofi-Aventis Investigational Site Number 32003
    Guatemala, Guatemala
  • Sanofi-Aventis Investigational Site Number 32004
    Guatemala, Guatemala
  • Sanofi-Aventis Investigational Site Number 32005
    Guatemala, Guatemala
  • Sanofi-Aventis Investigational Site Number 48402
    Guadalajara, 44340, Mexico
  • Sanofi-Aventis Investigational Site Number 48406
    Mexico, 11340, Mexico
  • Sanofi-Aventis Investigational Site Number 48401
    Mérida, 97070, Mexico
  • Sanofi-Aventis Investigational Site Number 48403
    San Luis Potosi, 72244, Mexico
  • Sanofi-Aventis Investigational Site Number 48407
    San Luis Potosi, 78200, Mexico
  • Sanofi-Aventis Investigational Site Number 48404
    Torreon, 27000, Mexico
  • Sanofi-Aventis Investigational Site Number 48408
    Zapopan, 44210, Mexico
  • Sanofi-Aventis Investigational Site Number 50403
    Casablanca, 20000, Morocco
  • Sanofi-Aventis Investigational Site Number 50401
    Casablanca, Morocco
  • Sanofi-Aventis Investigational Site Number 50402
    Casablanca, Morocco
  • Sanofi-Aventis Investigational Site Number 50405
    Casablanca, Morocco
  • Sanofi-Aventis Investigational Site Number 50404
    Rabat, Morocco
  • Sanofi-Aventis Investigational Site Number 50406
    Rabat, Morocco
  • Sanofi-Aventis Investigational Site Number 78805
    Ariana, Tunisia
  • Sanofi-Aventis Investigational Site Number 78804
    La marsa, Tunisia
  • Sanofi-Aventis Investigational Site Number 78802
    Menzel Bourguiba, Tunisia
  • Sanofi-Aventis Investigational Site Number 78813
    Monastir, 5000, Tunisia
  • Sanofi-Aventis Investigational Site Number 78815
    Sousse, Tunisia
  • Sanofi-Aventis Investigational Site Number 78801
    Tunis, 1008, Tunisia
  • Sanofi-Aventis Investigational Site Number 78812
    Tunis, 1008, Tunisia
  • Sanofi-Aventis Investigational Site Number 78803
    Tunis, Tunisia
  • Sanofi-Aventis Investigational Site Number 78807
    Tunis, Tunisia
  • Sanofi-Aventis Investigational Site Number 784-001
    Abu Dhabi, United Arab Emirates
  • Sanofi-Aventis Investigational Site Number 784-02
    Dubai, 4545, United Arab Emirates
  • Sanofi-Aventis Investigational Site Number 86201
    Maracaibo, Venezuela
08

References and documents

Publications

  • Bobrie G; I-ADD Study Investigators. I-ADD study: assessment of efficacy and safety profile of irbesartan/amlodipine fixed-dose combination therapy compared with irbesartan monotherapy in hypertensive patients uncontrolled with irbesartan 150 mg monotherapy: a multicenter, phase III, prospective, randomized, open-label with blinded-end point evaluation study. Clin Ther. 2012 Aug;34(8):1720-34.e3. doi: 10.1016/j.clinthera.2012.07.001. Epub 2012 Jul 30. PubMed 22853847 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 26, 2010, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT00957554
Lead sponsor
Sanofi
First posted
Aug 12, 2009
Start date
Jul 2009
Primary completion
Sep 2010
Completion
Sep 2010
Last update
Oct 26, 2010

Study contacts

Nathalie Genes, MD
study director · Sanofi
View the source record on ClinicalTrials.gov ↗

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