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Chronic Obstructive Pulmonary DiseasePhase 4EDAINCT04238221

Effect of add-on Doxofylline on Lung Function in Stable COPD

A Phase 4 study testing Doxofylline in people with Chronic Obstructive Pulmonary Disease, run by University of Milan at 1 site in Italy.

Not yet recruiting

Opening soon. The study is approved but enrolment has not started yet. Sites may already take enquiries.

Sites and contacts
Official record
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Trial summary

It is a phase IV, prospective, interventional, single blind, randomized, crossover trial in which the investigators will evaluate the effects of a 4-week treatment with doxofylline 400 mg bid, in add-on to maximal inhalation therapy, in clinically stable COPD patients. Read more about this study

Who is it for?
Ages 40 years and older
Conditions the study is for
Chronic Obstructive Pulmonary Disease
What is being tested?
Doxofylline
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
78 participants
Where
1 siteItaly
Study dates
1 Dec 2026to 30 Dec 2027
Phase
Phase 4
Are there results?
Not yet: the study is under way

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

Who may be able to join

  • COPD diagnosis for at least 6 months, according to current European Respiratory Society guidelines
  • baseline FEV1 ≤ 80% of predicted value
  • active or former smokers with smoking history ≥ 10 pack-years
  • patients chronically treated with a long acting muscarinic antagonist (LAMA) and a long acting beta-2 agonists (LABA), in association with or without an inhaled corticosteroid (ICS)
  • clinically stable disease for 6 months.

Who cannot join

  • previous or current diagnosis of bronchial asthma
  • previous lung volume reduction through surgery or endobronchial valves
  • inability to perform respiratory function tests according to international standards, or contraindications to perform 6-minute walking test
  • known allergy or intolerance to doxofylline
  • current or potential pregnancy
  • mini-Mental test <21
Show all 14Show fewer
  • congestive heart failure NYHA III or IV
  • recent (<6 months) myocardial infarction
  • unstable arrhythmias
  • chronic hypotension
  • active peptic ulcer
  • severe liver disease
  • active neoplasia
  • history of drug or alcohol abuse.

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Pierachille Santus, MD, PhD contact

0239043801

pierachille.santus@unimi.it

Dejan Radovanovic, MD contact

dejan.radovanovic@unimi.it

Italy1 site
  • L. Sacco Hospital

    Milan, 20157

    Pierachille Santus, MD, PhD, 0239042801, pierachille.santus@unimi.it

Other trials in Italy

About this study

Official title: Effect of Doxofylline on Bronchial Obstruction, in add-on to Maximal Inhalation Therapy, in Clinically Stable COPD Patients.

It is a phase IV, prospective, interventional, single blind, randomized, crossover trial in which the investigators will evaluate the effects of a 4-week treatment with doxofylline 400 mg bid, in add-on to maximal inhalation therapy, in clinically stable COPD patients.

Read the detailed description

The investigators will evaluate the effects of a 4-week treatment with doxofylline 400 mg, in add-on to maximal inhalation therapy (bronchodilators with or without a fixed dose combination with inhaled corticosteroids), in clinically stable COPD patients.

After screening and collection of informed consent, study participants will undergo a 7-day run-in, during which compliance to inhaled therapy and clinical stability will be assessed.

On the first visit patients will complete questionnaires (CAT, mMRC and SGRQ) to assess baseline respiratory function and health related quality of life.

After the first visit, patients will undergo a washout period during which the inhaled therapy will be withheld for 24 hours (7 days in case of chronic therapy with tiotropium).

The following day (the 8th day in case of tiotropium use), patients will perform the baseline measurement of the following:

  1. plethysmography
  2. DLCO
  3. maximal inspiratory pressure (MIP) and maximal expiratory pressure (MEP)
  4. 6-minute walk test (6MWT) with the assessment of dyspnea scale (Borg scale) at rest and after exercise.

Sixty minutes after the administration of the usual chronic inhalation therapy, patients will then perform the same respiratory lung functional bundle of tests as detailed above (from 1 to 3).

Subsequently, patients will be randomized in two parallel arms (arm A and arm B). Patients assigned to arm A will be prescribed 30-day treatment with doxofylline 400 mg bid, in addition to their chronic inhalation therapy, and will take the first dose of the medication; patients assigned to arm B will have their chronic therapy unchanged.

Randomization, drug administration and patient training will be performed by an operator not involved in patients' recruitment, data collection and analysis.

180 minutes after the administration of the usual chronic inhalation therapy, patients will repeat the lung function bundle from point 1 to 3.

During the subsequent 4-week treatment, patients' compliance will be monitored by telephone calls. Any adverse event will be registered and will be treated according to our center's standard operating procedures and good clinical practice by the treating physician.

After 4 weeks, before the administration of the morning dose, patients will be asked to complete the CAT, mMRC and SGRQ questionnaires and to perform the baseline functional bundle detailed in points 1 to 4. Patients will be asked to take the home inhalation therapy, as well as doxofylline if arm A. Respiratory function tests from points 1 to 3 will be repeated 60 minutes after drug administration. After that, patients assigned to Arm B will take the first dose of doxofylline. Respiratory function tests from points 1 to 3 will then be repeated 180 minutes after inhalation therapy administration. Eventually, the 6-MWT will be performed by patients assigned to Arm A, with assessment of the Borg dyspnea scale.

During the subsequent 4 weeks, patients assigned to arm B will be prescribed therapy with doxofylline 400 mg bid in addition to their chronic inhalatory therapy, while patients assigned to arm A will have only their usual chronic inhalation therapy. Compliance monitoring and adverse event management will be handled as previously discussed.

At the end of the 4 weeks, before the administration of the morning dose, patients will be asked to complete the CAT, mMRC and SGRQ questionnaires and to perform the baseline functional bundle detailed in points 1 to 4. Patients will be asked to take the home inhalation therapy, as well as doxofylline if arm B. Respiratory function tests from points 1 to 3 will be repeated 60 minutes and 180 minutes after drug administration. Eventually, the 6-MWT will be performed by patients assigned to Arm B, with assessment of the Borg dyspnea scale.

A 30-day follow up will be performed after the last visit, in order to register any late drug adverse reaction or adverse events..

Being tested
Doxofylline
Keywords
COPD, Bronchodilator, Pulmonary Function Test, Doxofylline, Methylxanthines, 6-minute walk test, FEV1
Medical subject headings
Pulmonary Disease, Chronic Obstructive

What participants receive

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

  • DoxofyllineDrug

    Also called Ansimar

    Patients will receive a 4-week treatment with doxofylline 400 mg bid, in addition to their chronic usual inhalation therapy.

Study groups in NCT04238221
Study groupRoleWhat they receive
Doxofylline+inhalation therapyExperimental4-week treatment with doxofylline tablets 400 mg bid in addition to maximal inhalation therapy, followed by 4-week treatment of maximal inhalation therapy only
Receives: Drug: Doxofylline
Inhalation therapyExperimental4-week treatment with maximal inhalation therapy only, followed by 4-week treatment with doxofylline tablets 400 mg bid in addition to maximal inhalation therapy
Receives: Drug: Doxofylline

What is being measured

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

  1. Difference in changes in FEV1 after 4 weeks of treatment

    Difference between changes in the Forced Expiratory Volume in one second (FEV1) measured at baseline and the FEV1 after 4 weeks of treatment with doxofylline in addition to inhalation therapy, measured 30 minutes before the morning dose of doxofylline plus inhalation therapy, and changes in the FEV1 measured at baseline and the FEV1 after 4 weeks of treatment with inhalation therapy only, measured 30 minutes before the morning dose of inhalation therapy.

    Measured: 4-8 weeks

Secondary outcomes (13)
  1. Change in FEV1 60' after drug administration

    Changes in the Forced Expiratory Volume in one second (FEV1) measured at baseline and the FEV1 measured 60 minutes after the first dose of doxofylline plus inhalation therapy.

    Measured: 60 minutes

  2. Difference in changes in distance covered in 6-minute walking test after 4 weeks of treatment

    Difference between changes in the distance covered in the 6-minute walking test (6-MWT) performed at baseline and the distance covered in 6-MWT performed after 4 weeks of treatment with doxofylline in addition to inhalation therapy, 30 minutes before the morning dose of doxofylline plus inhalation therapy, and changes in the distance covered in the 6-MWT performed at baseline and the 6-MWT performed after 4 weeks of treatment with inhalation therapy alone, 30 minutes before the morning dose of inhalation therapy.

    Measured: 4-8 weeks

  3. Changes in distance covered in 6-minute walking test 180' after drug administration

    Change in the distance covered in the 6-minute walking test (6-MWT) performed at baseline and the distance covered in 6-MWT performed after 4 weeks of treatment with doxofylline in addition to inhalation therapy, 180 minutes after the morning dose of doxofylline

    Measured: 4-8 weeks

  4. Difference in changes in resting and effort dyspnea after 4 weeks of treatment

    Difference between changes in the modified Borg dyspnea scale assessed before and after the 6-minute walking test (6-MWT) performed at baseline and the modified Borg dyspnea scale assessed before and after the 6-MWT performed after 4 weeks of treatment with doxofylline in addition to inhalation therapy, 30 minutes before the morning dose of doxofylline plus inhalation therapy, and changes in the modified Borg dyspnea scale assessed before and after the 6-MWT performed at baseline and the modified Borg dyspnea scale assessed before and after the 6-MWT performed after 4 weeks of treatment with inhalation therapy alone, 30 minutes before the morning dose of inhalation therapy.

    Modified Borg dyspnea scale is used to rate difficulty of breathing and ranges from 0 (absence of dyspnea) to 10 (maximum dyspnea).

    Measured: 4-8 weeks

  5. Changes in resting and effort dyspnea 180' after drug administration

    Difference between the modified Borg dyspnea scale assessed before and after the 6-minute walking test (6-MWT) performed at baseline and the modified Borg dyspnea scale assessed before and after the 6-MWT performed after 4 weeks of treatment with doxofylline in addition to inhalation therapy, 180 minutes after the morning dose of doxofylline plus inhalation therapy.

    Modified Borg dyspnea scale is used to rate difficulty of breathing and ranges from 0 (absence of dyspnea) to 10 (maximum dyspnea).

    Measured: 4-8 weeks

  6. Difference in changes in modified Medical Research Council (mMRC) scale after 4 weeks of treatment

    Difference between changes in the score of modified Medical Research Council (mMRC) scale at baseline and after 4 weeks of treatment with doxofylline in addition to chronic inhalation therapy and changes in the score of mMRC at baseline and after 4 weeks of treatment with chronic inhalation therapy alone.

    The mMRC scale is used to assess the severity of dyspnea and ranges from 0 to 4; the higher the score, the higher the dyspnea sensation.

    Measured: 4-8 weeks

  7. Difference in changes in COPD Assessment Test (CAT) score after 4 weeks of treatment

    Difference between changes in the score of COPD Assessment Test (CAT) at baseline and after 4 weeks of treatment with doxofylline in addition to chronic inhalation therapy and changes in the score of CAT at baseline and after 4 weeks of treatment with chronic inhalation therapy alone.

    The CAT score is used to assess the impact of COPD on a patient's daily life, and ranges from 0 (suggesting no significant impact) to 40 (suggesting a very severe impact)

    Measured: 4-8 weeks

  8. Difference in changes in St. George Respiratory Questionnaire (SGRQ) after 4 weeks of treatment

    Difference between changes in the score of St. George Respiratory Questionnaire (SGRQ) at baseline and the score of SGRQ after 4 weeks of treatment with doxofylline in addition to inhalation therapy and changes in the score of SGRQ at baseline and the SGRQ after 4 weeks of treatment with inhalation therapy alone.

    SGRQ is designed to measure the impact on overall health, daily life, and perceived well-being in patients with obstructive airways disease. Scores range from 0 to 100, with higher scores indicating more limitations.

    Measured: 4-8 weeks

  9. Difference in changes in vital capacity after 4 weeks of treatment

    Difference between changes in the slow vital capacity (VC) measured at baseline and the VC after 4 weeks of treatment with doxofylline in addition to inhalation therapy, measured 30 minutes before the morning dose of doxofylline plus inhalation therapy, and changes in the VC measured at baseline and the VC after 4 weeks of treatment with inhalation therapy only, measured 30 minutes before the morning dose of inhalation therapy.

    Measured: 4-8 weeks

  10. Difference in changes in residual volume after 4 weeks of treatment

    Difference between changes in the residual volume (RV) measured at baseline and the RV after 4 weeks of treatment with doxofylline in addition to inhalation therapy, measured 30 minutes before the morning dose of doxofylline plus inhalation therapy, and changes in the RV measured at baseline and the RV after 4 weeks of treatment with inhalation therapy only, measured 30 minutes before the morning dose of inhalation therapy.

    Measured: 4-8 weeks

  11. Difference in changes in functional residual capacity after 4 weeks of treatment

    Difference between changes in the functional residual capacity (FRC) measured at baseline and the FRC after 4 weeks of treatment with doxofylline in addition to inhalation therapy, measured 30 minutes before the morning dose of doxofylline plus inhalation therapy, and changes in the FRC measured at baseline and the FRC after 4 weeks of treatment with inhalation therapy only, measured 30 minutes before the morning dose of inhalation therapy.

    Measured: 4-8 weeks

  12. Difference in changes in inspiratory capacity after 4 weeks of treatment

    Difference between changes in the inspiratory capacity (IC) measured at baseline and the IC after 4 weeks of treatment with doxofylline in addition to inhalation therapy, measured 30 minutes before the morning dose of doxofylline plus inhalation therapy, and changes in the IC measured at baseline and the IC after 4 weeks of treatment with inhalation therapy only, measured 30 minutes before the morning dose of inhalation therapy.

    Measured: 4-8 weeks

  13. Difference in changes in specific airway resistance after 4 weeks of treatment

    Difference between changes in the specific airway resistances (sRaw) measured at baseline and the sRaw after 4 weeks of treatment with doxofylline in addition to inhalation therapy, measured 30 minutes before the morning dose of doxofylline plus inhalation therapy, and changes in the sRaw measured at baseline and the sRaw after 4 weeks of treatment with inhalation therapy only, measured 30 minutes before the morning dose of inhalation therapy.

    Measured: 4-8 weeks

Timeline

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

  1. First posted23 Jan 2020
  2. Study start1 Dec 2026 (estimated)
  3. Primary completion1 Dec 2027 (estimated)
  4. Study completion30 Dec 2027 (estimated)

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
Crossover
Model description
Phase 4, single center, prospective, interventional, randomized, single blind, crossover
Masking
Triple blind
Who is masked
Care provider, Investigator, Outcomes assessor
Enrolment
78 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04238221
Sponsor's protocol ID
01-PNSNP-2020
Acronym
EDAI
Status last verified
Apr 2026
First submitted
14 Jan 2020
Last updated
29 Apr 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A Phase 4 study testing Doxofylline in people with Chronic Obstructive Pulmonary Disease, run by University of Milan at 1 site in Italy.

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 5 inclusion and 14 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: opening soon, as of the sponsor's last update on 29 Apr 2026. 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 Italy. 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?

This study is still under way. Results are not available in the source record yet.

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

Contact Pierachille Santus, MD, PhD (0239043801, pierachille.santus@unimi.it), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Difference in changes in FEV1 after 4 weeks of treatment (time frame: 4-8 weeks). 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 29 Apr 2026.

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