- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04565847
The Effects of Salbutamol on Mannitol Induced Cough Responses in Healthy Controls (COMA)
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
The study will have a maximum of 4 visits separated by at least 24 hours. The first 2 visits will determine eligibility. All eligible subjects will be invited back for a third and a fourth visit.
Screening Period (Visits 1 and 2) - For All Subjects Eligible subjects will be identified during the initial screening procedures with measures of spirometry, hyperresponsiveness to methacholine, complete history, physical examination, allergen skin test, and mannitol cough challenge. The screening procedures will be conducted over 2 separate visits.
Effects of Salbutamol (Visit 3 and 4) - For Healthy Control Subjects, Twenty subjects with no evidence of asthma will return for visit 3 and 4. These visits must be at least 24h apart and no longer than 7 days. Health controls will first receive salbutamol 2.5mg or saline placebo via a nebuliser and 15 mins later the forced expiratory volume at one second (FEV1) measured. Subjects will then undergo a mannitol cough challenge exactly like the previous mannitol cough challenges. These data will be used for determining the effects of salbutamol on mannitol-induced cough.
Visit Windows Each visit must be separated by a minimum of 24 hours, and a maximum of 7 days. Study visits can be performed in the morning or afternoon, however for each subject the timing should be consistent with Visits 2 at the same time of day ± 2 hours
Study Type
Enrollment (Actual)
Phase
- Phase 2
Contacts and Locations
Study Locations
-
-
Ontario
-
Hamilton, Ontario, Canada, L8N 3Z5
- McMaster University
-
Hamilton, Ontario, Canada, L8N 3Z5
- McMaster Cardio-Respiratory Research Lab
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Able to understand and give written informed consent.
- Male and female volunteers 18 through 65 years of age.
- No airway hyperresponsiveness as determined by methacholine PC20>16mg/ml or mannitol PD15 > 635 mg, or < 10% incremental fall in FEV1 between consecutive mannitol doses.
- Fall in FEV1 of ≤ 5% after any mannitol dose during mannitol challenge compared to baseline FEV1 at 0 mg at screening mannitol challenge (Visit 2).
- Baseline FEV1≥ 80% of the predicted value.
- Demonstrate cough response to inhaled mannitol.
Exclusion Criteria:
- Current or former smoker with >10-pack-year history
- Current or previous history of other significant respiratory disease
- Significant systemic disease, including history of current malignancy or autoimmune disease
- Pregnancy or breastfeeding.
- Use of corticosteroids within 28 days prior to the first study visit.
- Use of nonsteroidal anti-inflammatory drugs (NSAIDs) within 48 hours of study visits or aspirin with 7 days of study visits
- Use of antihistamines including those in cold and allergy medications within 72 hours of study visits
- Use of caffeine-containing products within 4 hours of study visits
- Use of ACE inhibitors
- Any centrally acting medication which in the view of the investigator could alter the sensitivity of the cough reflex including but not restricted to tricyclic anti-depressants, pregabalin, gabapentin, codeine, tramadol, or any other opioid.
- Unwillingness or inability to comply with the study protocol for any other reason
Study Plan
How is the study designed?
Design Details
- Primary Purpose: OTHER
- Allocation: RANDOMIZED
- Interventional Model: CROSSOVER
- Masking: QUADRUPLE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
ACTIVE_COMPARATOR: Healthy Control - Active Arm
Healthy Controls Mannitol-Induced Cough Challenges on Visit 2 to determine elligibility (cough response).
Mannitol delivered via inhalation.
Dosage: 0, 5, 10, 20, 40 mg capsules.
80 and 160 mg doses delivered with two and four capsules, respectively.
Nebulized salbutamol (5mg/mL) given prior to Mannitol-Induced Cough Challenges on Visit 3 or 4.
|
Nebulized salbutamol given prior to Mannitol-Induced Cough Challenge
Other Names:
|
PLACEBO_COMPARATOR: Healthy control - Placebo Arm
Healthy Controls Mannitol-Induced Cough Challenges on Visit 2 to determine elligibility (cough response).
Mannitol delivered via inhalation.
Dosage: 0, 5, 10, 20, 40 mg capsules.
80 and 160 mg doses delivered with two and four capsules, respectively.
Nebulized 0.9% Saline given prior to Mannitol-Induced Cough Challenges on Visit 3 or 4.
|
Nebulized 0.9% saline given prior to Mannitol-Induced Cough Challenge
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Primary Outcome - Emax
Time Frame: Through study completion, an average of 1 year
|
The effect of salbutamol on mannitol induced coughs Emax - the maximum number of coughs at any dose of mannitol.
|
Through study completion, an average of 1 year
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Cough dose response curves
Time Frame: Through study completion, an average of 1 year
|
Comparison of mannitol-induced cough dose response curves in normal healthy controls treated with salbutamol compared with placebo.
|
Through study completion, an average of 1 year
|
ED50
Time Frame: Through study completion, an average of 1 year
|
The effect of salbutamol on mannitol induced coughs E50 - the dose of mannitol causing half the maximal response.
|
Through study completion, an average of 1 year
|
C2
Time Frame: Through study completion, an average of 1 year
|
Comparison of the mannitol dose causing 2 coughs (C2) in a mannitol induced cough challenge in healthy controls treated with salbutamol compared with placebo.
|
Through study completion, an average of 1 year
|
C5
Time Frame: Through study completion, an average of 1 year
|
Comparison of the mannitol dose causing 5 coughs (C5) in a mannitol induced cough challenge in healthy controls treated with salbutamol compared with placebo.
|
Through study completion, an average of 1 year
|
Cumulative number of coughs
Time Frame: Through study completion, an average of 1 year
|
Comparison of the cumulative number of coughs in a mannitol induced cough challenge in healthy controls treated with salbutamol compared with placebo.
|
Through study completion, an average of 1 year
|
Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (ACTUAL)
Primary Completion (ACTUAL)
Study Completion (ACTUAL)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (ACTUAL)
Study Record Updates
Last Update Posted (ACTUAL)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Respiratory Tract Diseases
- Respiration Disorders
- Signs and Symptoms, Respiratory
- Cough
- Physiological Effects of Drugs
- Adrenergic Agents
- Neurotransmitter Agents
- Molecular Mechanisms of Pharmacological Action
- Autonomic Agents
- Peripheral Nervous System Agents
- Adrenergic Agonists
- Bronchodilator Agents
- Anti-Asthmatic Agents
- Respiratory System Agents
- Reproductive Control Agents
- Adrenergic beta-2 Receptor Agonists
- Adrenergic beta-Agonists
- Tocolytic Agents
- Albuterol
Other Study ID Numbers
- McMaster-COMA-11537
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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