A randomized, parallel, placebo controlled trial to evaluate the effect of 100mg/day losartan on the progression of emphysema as measured by quantitative HRCT compared to placebo .



Eligible Ages
Over 40 Years
Eligible Genders
Accepts Healthy Volunteers

Inclusion Criteria

  • Mild to severe COPD: Ratio of forced expiratory volume in 1 second (FEV1)/forced vital capacity (FVC) less than or equal to 0.70, FEV1 20-80% of predicted
  • Current or former smoker
  • HRCT scan with 5-35% of voxels with density less than -950 Hounsfield Units (HU)
  • Ability to understand and willingness to sign consent documents

Exclusion Criteria

  • Current therapy with angiotensin converting enzyme (ACE) inhibitor or angiotensin receptor blocker (ARB)
  • Known intolerance to ACE inhibitor or ARB
  • History of angioedema
  • Conventional indication for ACE inhibitor or ARB (e.g., history of myocardial infarction, known cardiomyopathy)
  • Renal insufficiency (GFR <30 mL/min by Cockcroft-Gault calculation)
  • Current regular use of NSAIDs defined as daily use 5 or more days of the week for more than one month
  • Potassium supplementation or serum potassium level of 5.0 milliequivalents (mEq)/dL or higher at V1
  • Current use of a potassium sparing diuretic
  • COPD exacerbation requiring treatment within 6 weeks at V1
  • Chronic systemic corticosteroid use of more than 10mg/day of prednisone
  • Resting SpO2 <89% on 2 L nasal cannula continuous flow; unless at altitude > 4,000 feet, then resting oxygen saturation (SpO2) <89% on 4 L N C continuous flow
  • Untreated arterial hypertension (systolic blood pressure greater than140 mm Hg, diastolic blood pressure greater than 90 mm Hg)
  • Blood pressure less than 90 mm Hg systolic or 60 mm Hg diastolic while standing or sitting
  • Known unilateral or bilateral renal artery stenosis higher than 70%
  • Previous lung resection surgery
  • Evidence of interstitial, occupational or chronic infectious lung disease
  • Changes to chest that preclude adequate HRCT imaging (e.g. Metallic objects in the chest such as shrapnel or pacemaker leads)
  • For women of child bearing potential, positive pregnancy test or unwillingness to use two methods of birth control or abstinence for the duration of the study
  • Major chronic illnesses which in the judgment of the study physician would interfere with participation in the study e.g. including but not limited to: cardiac, renal, hepatic (LFTs more than 2.5x normal upper limit), neurological, psychiatric, endocrine or neoplastic diseases, uncontrolled diabetes, uncontrolled HIV infection or other immune system disorder, hyperthyroidism, seizure disorders, non-skin cancer, rheumatic diseases
  • Failure to keep screening appointments or other indicators of non-adherence
  • Inability to be contacted by telephone
  • Intention to leave area within 12 months

Study Design

Phase 4
Study Type
Intervention Model
Parallel Assignment
Primary Purpose
Triple (Participant, Care Provider, Investigator)

Arm Groups

ArmDescriptionAssigned Intervention
Active Comparator
At randomization participants will start with a dose of 50mg (one capsule) once a day for 2 weeks. If this dose is well tolerated and systolic BP is >90 mm Hg and diastolic BP is > 60 mm Hg, the dose will be increased to 100 mg (2 capsules) once a day for the remaining 46 weeks.
  • Drug: Losartan
    50mg once per day for two weeks,followed by 100mg once per day for 46 weeks if increased dose tolerated
Placebo Comparator
At randomization participants will start with a dose of one capsule (inactive) once a day for 2 weeks. After two weeks, if systolic BP is >90 mm Hg and diastolic BP is > 60 mm Hg, the dose will be increased to 2 capsules once a day for the remaining 46 weeks.
  • Drug: Placebo
    one capsule per day for two weeks, followed by two capsules per day for 46 weeks

More Details

Active, not recruiting
JHSPH Center for Clinical Trials

Study Contact

Detailed Description

This is a trial designed to test if a treatment, losartan, may decrease the progression of Chronic Obstructive Pulmonary Disease (COPD). Losartan is an angiotensin receptor blocking agent, commonly used as an antihypertensive agent, which has been shown to alter cardiac remodeling after myocardial infarction and renovascular remodeling in diabetes-mellitus. In this trial participants with mild to severe COPD, with Computed Tomography (CT) evidence of emphysema (5-35% of voxels with < -950 Hounsfield Units), will be randomly assigned to receive 100mg/day of losartan or placebo for 48 weeks. The primary outcome measure will be the rate of progression of emphysema, quantified as the percent of lung voxels with a density less than -950 HU as measured by High Resolution CT (HRCT, from baseline to 48 weeks.


Study information shown on this site is derived from ClinicalTrials.gov (a public registry operated by the National Institutes of Health). The listing of studies provided is not certain to be all studies for which you might be eligible. Furthermore, study eligibility requirements can be difficult to understand and may change over time, so it is wise to speak with your medical care provider and individual research study teams when making decisions related to participation.