Chronic Cough


Do you suffer from chronic cough?


Chronic cough is common, affecting at least 10% of the world's population and representing a significant physical and psychosocial burden.

Chronic cough is defined as a daily cough lasting more than 8 weeks, a persistent cough, despite investigation and medical treatment.

It can be secondary to chronic diseases such as asthma or chronic obstructive pulmonary disease (COPD).

If you constantly cough in an unexplained way, it's probably a chronic cough.

We are conducting a clinical study in chronic cough to assess the safety and efficacy to support the development of a new potential treatment, so that it can be offered to people with this condition in Canada. This treatment is not yet approved for use in Canada, but this clinical study will help better understand the effects of the treatment.

This study has two parts.

To participate in the first part, you must:

  • Be between 18 and 80 years old
  • Have been diagnosed with asthma for at least 12 months or diagnosed with unexplained cough for at least 52 weeks

To participate in the second part, you must:

  • Be aged 40 or over
  • Have been diagnosed with COPD for at least 52 weeks 

You will be reimbursed for expenses related to the study during your participation and you will be surrounded by a medical team throughout the process.

I want to apply to this clinical study


For more information, contact us at 581 477-3439 (Québec) or at 1-844-739-3439 (toll free), or fill the online form.

The study process in pictures


Step 1 | Before starting the study, we will take time to fully explain the selection process and the conduct of the study by phone.


Step 2 | After the initial phone interview, if you are still interested in taking part in a study, we schedule a preliminary meeting with you during which you may ask all the questions you wish and take the time you require to read over the consent form. This form explains, in detail, the different stages of each study.


Step 3 | You may make a decision at that time to move forward with or terminate the selection process. However, you are under no obligation to make an immediate decision. Based on briefing content, you may take the time necessary to come to a decision and consult with your personal physician or loved ones.


Step 4 | Depending on the nature of the study, some tests or medical examinations may be required. In the majority of cases, these tests or examinations are conducted on Diex Research premises based on your individual availability.


Step 5 | If you are eligible, you may then begin a clinical study with us.