Study of the Efficacy and Safety of SCH 486757 in Subjects With Chronic Cough (Study P04887)

Study of the Efficacy and Safety of SCH 486757 in Subjects With Chronic Idiopathic Cough

This is a randomized, double-blind, placebo-controlled, crossover, single center study of SCH 486757 in subjects with chronic cough. Subjects will be randomized to receive SCH 486757 or placebo for 14 days. After a 2-week washout period, subjects will be crossed over to the other treatment. The primary objective is to evaluate the effectiveness of SCH 486757 in reducing cough reflex sensitivity as determined by a challenge with capsaicin, an agent that induces cough.

Study Overview

• Status: Completed
• Conditions: Cough
• Intervention / Treatment: Drug: SCH 486757; Drug: Placebo Dose 1

• Study Type: Interventional
• Enrollment (Actual): 31
• Phase: Phase 2

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 65 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Male and female subjects, 18 to <65 years old, with a history of a dry cough for >6 months.
• By history, evaluation of gastroesophageal reflux disease was done and ruled out by a minimum of an 8-week trial of antacid therapy (with a proton-pump inhibitor [PPI] given twice daily) with no clinical response in cough.
• By history, if there are clinical signs and symptoms of postnasal drip, these signs and symptoms will have been treated with a combination of an antihistamine and decongestant for a minimum of 8 weeks with no clinical response in cough.
• By history, if there are clinical signs and symptoms of asthma, these signs and symptoms will have been treated with a combination of an inhaled steroid and a short-acting beta-agonist for a minimum of 8 weeks with no clinical response in cough.

Exclusion Criteria:

• Subjects with current evidence of clinically significant pulmonary (especially conditions that involve coughing), hematopoietic, cardiovascular, hepatic, renal, neurologic, psychiatric, autoimmune, or other disease that precludes the subject's participation in the study. In particular, diabetics, uncontrolled hypertensives, and subjects with clinically significant cardiomyopathy, prostatic hypertrophy, glaucoma, seizure disorders, and psychiatric disorders are to be excluded from participation in this study.
• Subjects with asthma or chronic obstructive pulmonary disease who require chronic use of inhaled or systemic corticosteroids.
• Subjects receiving concurrent prohibited medications unless they observe the washout period prior to the baseline visit. These medications would include opioid- and non-opioid-containing cough suppressants and potent CYP3A inhibitors, such as ritonavir, ketoconazole, and clarithromycin. Subjects receiving ACE inhibitors or MAOIs will be excluded from the study.
• Subjects with a history of allergies to more than two classes of medications.
• Current smokers, ex-smokers who stopped smoking in the previous 6 months, or subjects with a cumulative smoking history >10 pack-years will be excluded. (Pack-years is a way to measure the amount a person has smoked over a long period of time. It is calculated by multiplying the number of packs of cigarettes smoked per day by the number of years the person has smoked, eg, a 10 pack-year history is equal to smoking 1 pack per day for 10 years or 2 packs per day for 5 years, etc.)

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Crossover Assignment
• Masking: Double

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Placebo Comparator: Placebo	Drug: Placebo Dose 1; Matching placebo capsules twice daily orally for 2 weeks followed by a 2 week washout period and 2 weeks of crossover treatment
Experimental: SCH 486757	Drug: SCH 486757; SCH 486757 2 x 50-mg capsule twice daily orally for 2 weeks followed by a 2-week washout period and 2 weeks of crossover treatment

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Change from baseline in cough reflex sensitivity as assessed by log10 C5 resulting from a capsaicin challenge. A capsaicin challenge will be performed on the first day (before dosing) and on the last day of each 2 week treatment period.	After 2 weeks of treatment.

Secondary Outcome Measures

Outcome Measure	Time Frame
Change from baseline in hourly cough rate over 24 hours (using an automated cough counter). Baseline will be measured as the total no. of coughs on Day 1 of each treatment period and compared with the same value on the last day of each treatment period.	After 2 weeks of treatment.

Collaborators and Investigators

• Sponsor: Merck Sharp & Dohme LLC

Study record dates

Study Major Dates

• Study Start: January 1, 2007
• Primary Completion (Actual): November 1, 2007
• Study Completion (Actual): November 1, 2007

Study Registration Dates

• First Submitted: July 23, 2007
• First Submitted That Met QC Criteria: July 23, 2007
• First Posted (Estimate): July 25, 2007

Study Record Updates

• Last Update Posted (Estimate): August 14, 2015
• Last Update Submitted That Met QC Criteria: August 13, 2015
• Last Verified: August 1, 2015

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Respiratory Tract Diseases; Respiration Disorders; Signs and Symptoms, Respiratory; Cough
• Other Study ID Numbers: P04887; SCH 486757