Clinical trial NCT03018756: Nebulized Fentanyl in Patients With Mild to Moderate Interstitial Lung Disease and Chronic Dyspnea
Official title: Use of Nebulized Fentanyl in Patients With Mild-to-Moderate Interstitial Lung Disease and Chronic Dyspnea
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE3
Conditions: Interstitial Lung Disease
Lead sponsor: Queen's University
Sponsor class: OTHER
Collaborators: name: Boehringer Ingelheim
First posted: 2017-01-12
Enrollment: 21
Sex: ALL
Minimum age (years): 40
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: CROSSOVER
Primary purpose: TREATMENT

Brief summary: Patients with interstitial lung disease (ILD) experience distressing activity-related respiratory discomfort which is challenging to manage therapeutically. Interventions such as pulmonary rehabilitation, collaborative self-management, supplemental oxygen therapy and oral opiate medications, are variably effective and therapeutic responses to each in individual patients are difficult to predict. The purpose of this study is to evaluate the acute effects of inhaled opiate therapy (fentanyl citrate) on breathing discomfort (dyspnea) in individuals with mild-to-moderate ILD, as well as examine the potential mechanisms of dyspnea relief.

Detailed description: Treatment with opioids can improve activity related dyspnea by reducing central respiratory neural drive. Inhaled fentanyl citrate is an opioid that is generally well tolerated and has been shown to effectively relieve respiratory discomfort without causing systemic side-effects, although its mechanism of action are poorly understood. Based on the current evidence, non-sedating, rapidly active inhaled fentanyl represents a possible alternative and effective treatment of severe dyspnea in patients with ILD who require urgent treatment. As such, the primary objective of this study is to examine the acute effects of nebulized fentanyl on dyspnea intensity and quality in patients with mild-to-moderate ILD, as well as examine the neurophysiological mechanisms of dyspnea relief during fentanyl inhalation. It is believed that fentanyl when compared with placebo, will reduce inspiratory neural drive to the diaphragm and breathing frequency, resulting in improvements in dyspnea intensity during physical exertion. Alternatively, dyspnea relief after inhaled fentanyl may be independent of changes in neural drive, and instead linked to the presence of opioid receptors in the lungs that modulate afferent inputs to the brain, thereby favourably influencing perceived dyspnea.

Eligibility criteria: Inclusion Criteria:

* Fibrotic interstitial lung disease (ILD) diagnosis confirmed by specialty ILD clinic
* A total lung capacity (TLC) \<lower limit of normal and ≥60%predicted, a forced vital capacity (FVC) \<lower limit of normal and ≥60%predicted, and a forced expiratory volume in 1 second (FEV1)/FVC \>70%.
* Clinically stable as defined by no changes in medication dosage or frequency of administration with no exacerbations or hospital admissions in the preceding 6 weeks.
* Moderate-to-severe chronic activity related dyspnea as defined by a Baseline Dyspnea Index total score ≤9, modified Medical Research Council score \>1, or oxygen cost diagram.
* Ability to perform all study procedures and provide/sign informed consent.

Exclusion Criteria:

* Women of childbearing age who are pregnant or trying to become pregnant.
* Diffusing capacity of the lung for carbon monoxide (DLCO) \<40 %predicted.
* Presence of active cardiopulmonary disease other than ILD that could contribute to dyspnea and exercise limitation.
* History of allergy or adverse reaction to fentanyl.
* History of allergy or adverse reaction to latex
* Presence of contraindications to pulmonary function or clinical exercise testing, including inability to exercise because of neuromuscular or musculoskeletal disease(s).
* Use of ambulatory oxygen or exercise-induced oxygen desaturation to \< 80% on room air.
* Body mass index (BMI) \<18.5 or ≥35.0 kg/m2.
* Use of antidepressant drugs (i.e., monoamine oxidase inhibitors, serotonin reuptake inhibitors) in the previous 2 weeks.
* Use of opioid drugs (e.g., morphine, fentanyl, oxycodone, codeine, etc.) in the previous 4 weeks.

Note: Healthy volunteers will only be used to assist in the characterization of the IPF study group, i.e., for comparison of baseline exercise responses. They will not undergo treatment.

Primary outcomes:
measure: Dyspnea intensity measured by the 10-point Borg Scale at a standardized time during cycle ergometer exercise
timeFrame: 10-minutes post-treatment
Secondary outcomes:
measure: Diaphragm electromyography (EMGdi) at a standardized time during cycle exercise
timeFrame: 10-minutes post-treatment
measure: Ventilation at a standardized time during cycle exercise
timeFrame: 10-minutes post-treatment
measure: Breathing frequency at a standardized time during cycle exercise
timeFrame: 10-minutes post-treatment
measure: Tidal volume at a standardized time during cycle exercise
timeFrame: 10-minutes post-treatment
measure: Inspiratory capacity at a standardized time during cycle exercise
timeFrame: 10-minutes post-treatment
Other outcomes:
Locations:
city: Kingston
country: Canada
facility: Respiratory Investigation Unit, Queen's University
state: Ontario
Study officials:
affiliation: Queen's University
name: Denis E O'Donnell, MD, FRCPC
role: PRINCIPAL_INVESTIGATOR
References: