Study to Evaluate the Efficacy and Safety of Oral Difelikefalin for Moderate to Severe Pruritus in Subjects With Notalgia Paresthetica
Study Details
Study Description
Brief Summary
This is a 2-part, multicenter, randomized, double-blind, placebo-controlled study to evaluate the efficacy and safety of twice-daily (BID) oral difelikefalin for moderate-to-severe pruritus in adult subjects with NP.
Condition or Disease | Intervention/Treatment | Phase |
---|---|---|
|
Phase 2/Phase 3 |
Detailed Description
Part A of this study will evaluate the benefit-risk of 3 doses of difelikefalin compared to placebo. The dose with the best benefit-risk profile will be further evaluated in Part B. Part A of this study comprises a 28-day Screening Period, a 7-day Run-in Period, an 8-week Double-blind Treatment Period, a 2-week Treatment Discontinuation Period, and a Safety Follow-up Visit (14 days after the last dose of study treatment).
Part B of this study will evaluate the efficacy, safety, and tolerability of oral difelikefalin. The dose of oral difelikefalin to be assessed in Part B will depend on the results of Part A. Part B of this study comprises a 28-day Screening Period, a 7-day Run-in Period, an 8-week Double-blind Treatment Period, up to a 52-week OLE Period, and a Safety Follow-up Visit.
Subjects who participated in Part A of the study may not participate in Part B.
All subjects will sign an informed consent form (ICF) and undergo screening for study eligibility.
Study Design
Arms and Interventions
Arm | Intervention/Treatment |
---|---|
Active Comparator: Difelikefalin 2.0 mg tablets Oral difelikefalin 2.0 mg tablet administered twice daily |
Drug: difelikefalin 2.0 mg tablets
Oral difelikefalin 2.0 mg administered twice daily
Other Names:
|
Active Comparator: Difelikefalin 1.0 mg tablets Oral difelikefalin 1.0 mg tablet administered twice daily |
Drug: difelikefalin 1.0 mg tablets
Oral difelikefalin 1.0 mg administered twice daily
Other Names:
|
Active Comparator: Difelikefalin 0.25 mg tablets Oral difelikefalin 0.25 mg tablet administered twice daily |
Drug: difelikefalin 0.25 mg tablets
Oral difelikefalin 0.25 mg administered twice daily
Other Names:
|
Placebo Comparator: Placebo tablets Oral placebo tablet administered twice daily |
Drug: Placebo tablets
Oral Placebo administered twice daily
|
Outcome Measures
Primary Outcome Measures
- Proportion of subjects achieving ≥4-point improvement from baseline in the weekly mean of the daily 24-hour I-NRS score [Baseline, Week 8]
Secondary Outcome Measures
- Proportion of subjects achieving ≥4-point improvement from baseline in the weekly mean of the daily 24-hour I-NRS score at Week 4 in Part B [Baseline, Week 4]
- Proportion of subjects achieving ≥4-point improvement from baseline in the weekly mean of the daily 24-hour I-NRS score at Week 2 in Part B [Baseline, Week 2]
- Proportion of subjects achieving ≥4-point improvement from baseline in the weekly mean of the daily 24-hour I-NRS score at Week 1 in Part B [Baseline, Week 1]
- Change from Baseline in the Numeric Rating Scale of Burning Sensation and Skin Tingling at Week 8 in Part B [Baseline, Week 8]
- Proportion of Subjects with H-IGA of Clear or Almost Clear at Week 8 in Part B [Week 8]
- Proportion of ≥4-point Improvement in Daily I-NRS at Day 2 in Part B [Day 2]
Eligibility Criteria
Criteria
Key Inclusion Criteria:
To be eligible for inclusion into the study, a patient must meet the following criteria:
-
Subject has clinically confirmed diagnosis of active Notalgia Paresthetica;
-
Subject has a history of chronic pruritus due to Notalgia Paresthetica;
-
Subject has moderate to severe pruritus;
-
Female subject is not pregnant or nursing during any period of the study.
Key Exclusion Criteria:
A patient will be excluded from the study if any of the following criteria are met:
-
Subject has pruritus attributed to a cause other than Notalgia Paresthetica;
-
Subject has any clinically significant medical condition or physical/laboratory/ECG/vital signs abnormality that would, in the opinion of the investigator, put the subject at undue risk or interfere with interpretation of study results.
Contacts and Locations
Locations
Site | City | State | Country | Postal Code | |
---|---|---|---|---|---|
1 | Cara Therapeutics Study Site | Coral Gables | Florida | United States | 33134 |
Sponsors and Collaborators
- Cara Therapeutics, Inc.
Investigators
- Study Director: Cara Therapeutics, Cara Therapeutics
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- CR845-310601