A Randomized, Double-blind, Placebo-controlled, Dose-escalation Study Evaluating the Efficacy of Two Doses of Duloxetine & Amitriptyline in Subjects With Refractory Chronic Cough
Who is this study for? Patients with refractory chronic cough
Status: Recruiting
Location: See location...
Intervention Type: Drug
Study Type: Interventional
Study Phase: Phase 2
SUMMARY
This research study is evaluating the effectiveness of escalating doses of Amitriptyline and Duloxetine in reducing cough frequency in patients with refractory chronic cough (RCC)
Eligibility
Participation Requirements
Sex: All
Minimum Age: 18
Maximum Age: 75
Healthy Volunteers: f
View:
• Chest radiograph or computed tomography (CT) of the thorax within the last 1 year not demonstrating any abnormality considered to be significantly contributing to the refractory chronic cough in the opinion of the Principal Investigator
• Have a diagnosis of refractory chronic cough or unexplained cough for at least one year according to the American College of Chest Physicians guidelines
• Have a score of ≥ 40mm on the Cough Severity VAS at Screening.
• Women of child-bearing potential must agree to use 2 forms of acceptable birth control and make no donation of eggs from Screening through the end of the 8-week study period. Acceptable birth control methods include established use of oral, injected, or implanted hormonal methods of contraception; intrauterine device (IUD) or intrauterine system (IUS); tubal ligation; or male sterilization. Double-barrier method (diaphragm for female subject and condom for male partner with spermicidal) satisfies the requirement for 2 forms of acceptable birth control. When concordant with the preferred lifestyle of the subject, true and complete abstinence (not periodic abstinence) is acceptable.
• Male subjects and their partners of child-bearing potential must use 2 methods of acceptable birth control, 1 of which must be a barrier method, and make no donation of sperm from Screening until 3 months after the last dose of study drug at the end of 8 weeks.
• Have provided written informed consent.
• Are willing and able to comply with all aspects of the protocol.
Locations
United States
Minnesota
Mayo Clinic in Rochester
RECRUITING
Rochester
Time Frame
Start Date:2021-11-01
Estimated Completion Date:2025-12
Participants
Target number of participants:50
Treatments
Experimental: Duloxetine and Placebo
Subjects will receive 30mg of Duloxetine for blinded period 1 (first 4 week treatment period) and 30mg of Duloxetine plus 30mg Placebo for blinded period 2 (additional 4 week treatment period). After this, subjects will be unblinded and receive routine clinical care for follow up phase (up to 52 weeks).
Experimental: Duloxetine dose escalation
Subjects will receive 30mg of Duloxetine for blinded period 1 (first 4 week treatment period) and 60mg of Duloxetine for blinded period 2 (additional 4 weeks treatment period). After this, subjects will be unblinded and receive routine clinical care for follow up phase (up to 52 weeks).
Experimental: Amitriptyline and Placebo
Subjects will receive 25mg of Amitriptyline for blinded period 1 (first 4 week treatment period) and 25mg of Amitriptyline plus 30mg Placebo for blinded period 2 (additional 4 week treatment period). After this, subjects will be unblinded and receive routine clinical care for follow up phase (up to 52 weeks).
Experimental: Amitriptyline dose escalation
Subjects will receive 25mg of Amitriptyline for blinded period 1 (first 4 week treatment period) and 50mg of Amitriptyline for blinded period 2 (additional 4 weeks treatment period). After this, subjects will be unblinded and receive routine clinical care for follow up phase (up to 52 weeks).
Placebo_comparator: Placebo
Subjects will receive 30mg of Placebo for blinded period 1 (first 4 week treatment period) and 60mg of Placebo for blinded period 2 (additional 4 weeks treatment period). After this, subjects will be unblinded and receive routine clinical care for follow up phase (up to 52 weeks).