A Study to Evaluate the Safety and Efficacy of CR845 in Chronic Kidney Disease Patients With Moderate-to-Severe Pruritus

NCT ID: NCT03617536

Last Updated: 2024-01-24

Study Results

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE2

Total Enrollment

269 participants

Study Classification

INTERVENTIONAL

Study Start Date

2018-07-05

Study Completion Date

2019-11-14

Brief Summary

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This is a multicenter, double-blind, randomized, placebo-controlled study to evaluate the safety and efficacy of 3 dose levels of oral CR845 compared to placebo in reducing the intensity of itch in chronic kidney disease (CKD) patients with moderate-to-severe pruritus. This study will consist of a Screening Period, a 7-day Run-in Period, a 12 week Treatment Period, and a Follow-up Visit (approximately 7 days after the last dose of study drug).

Detailed Description

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This study will consist of a Screening Period, a 7-day Run-in Period, a 12 week Treatment Period, and a Follow-up Visit (approximately 7 to 10 days after the last dose of study drug). Informed consent will be obtained prior to performing any study-specific procedures. Screening will occur within 7 to 28 days prior to randomization to assess eligibility.

If patients continue to meet all inclusion and no exclusion criteria at the end of the 7-day Run-in Period, they will be randomized in a 1:1:1:1 ratio to receive orally once daily either placebo or CR845 tablets at doses of 0.25, 0.5 or 1 mg. Randomization will be stratified according to the patient's renal disease status: moderate CKD; severe CKD non-dialysis; severe CKD on dialysis (ie, 3 categories). A final safety Follow-up Visit will be conducted 7 to 10 days after the last dose of study drug.

Conditions

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Chronic Kidney Diseases Pruritus

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Randomized, double-blind, placebo controlled study
Primary Study Purpose

TREATMENT

Blinding Strategy

DOUBLE

Participants Investigators
CR845 will be provided as enteric-coated tablets. All tablets are white in color with no markings and are identical in appearance, regardless of dose.

CR845 tablets will be provided at doses of 0.25, 0.5, and 1 mg.

Study Groups

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CR845 0.25 mg Oral Tablet

Oral CR845 0.25 mg to be taken orally once daily for 12 weeks

Group Type EXPERIMENTAL

CR845 0.25 mg Oral Tablet

Intervention Type DRUG

CR845 0.25 mg medication taken orally 1 time/day

CR845 0.5 mg Oral Tablet

Oral CR845 0.5 mg to be taken orally once daily for 12 weeks

Group Type EXPERIMENTAL

CR845 0.5 mg Oral Tablet

Intervention Type DRUG

CR845 0.5 mg medication taken orally 1 time/day

CR845 1 mg Oral Tablet

Oral CR845 1 mg to be taken orally once daily for 12 weeks

Group Type EXPERIMENTAL

CR845 1 mg Oral Tablet

Intervention Type DRUG

CR845 1 mg medication taken orally 1 time/day

Placebo Oral Tablet

Oral Placebo to be taken orally once daily

Group Type PLACEBO_COMPARATOR

Placebo Oral Tablet

Intervention Type DRUG

Placebo tablet taken orally 1 time/day

Interventions

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CR845 0.25 mg Oral Tablet

CR845 0.25 mg medication taken orally 1 time/day

Intervention Type DRUG

CR845 0.5 mg Oral Tablet

CR845 0.5 mg medication taken orally 1 time/day

Intervention Type DRUG

CR845 1 mg Oral Tablet

CR845 1 mg medication taken orally 1 time/day

Intervention Type DRUG

Placebo Oral Tablet

Placebo tablet taken orally 1 time/day

Intervention Type DRUG

Other Intervention Names

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Difelikefalin Difelikefalin Difelikefalin

Eligibility Criteria

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Inclusion Criteria

To be eligible for inclusion into the study, a patient must meet the following criteria:

* CKD patients with stage III, IV, or V (ie, moderate renal impairment with estimated glomerular filtration rate (GFR) ≥30 and \<60 mL/min/1.73 m2 or severe renal impairment with estimated GFR \<30 mL/min/1.73 m2).
* For severe CKD patients on hemodialysis, they must be receiving hemodialysis 3 times per week for at least 3 months prior to the start of screening;
* Prior to randomization:

1. Has completed at least 4 Worst Itching Intensity NRS worksheets from the start of the 7-day Run-in Period;
2. Has a mean baseline Worst Itching Intensity NRS score ≥5, defined as the average of all non-missing scores reported from the start of the 7-day Run-in Period.

Exclusion Criteria

A patient will be excluded from the study if any of the following criteria are met:

* Patients not currently on dialysis who are likely to initiate routine dialysis during study participation;
* Scheduled to receive a kidney transplant during the study;
* New or change of treatment received for itch including antihistamines and corticosteroids (oral, intravenous \[IV\], or topical) within 14 days prior to screening;
* Received another investigational drug within 30 days prior to the start of screening or is planning to participate in another clinical study while enrolled in this study;
* Received ultraviolet B treatment within 30 days prior to the start of screening or anticipates receiving such treatment during the study;
* Participated in a previous clinical study with CR845.
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Cara Therapeutics, Inc.

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Frédérique Menzaghi, PhD

Role: STUDY_DIRECTOR

Cara Therapeutics

Locations

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Cara Therapeutics Study Site

Birmingham, Alabama, United States

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Cara Therapeutics Study Site

Florence, Alabama, United States

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Cara Therapeutics Study Site

Phoenix, Arizona, United States

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Cara Therapeutics Study Site

Prescott, Arizona, United States

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Sun City, Arizona, United States

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Cara Therapeutics Study Site

Harrisburg, Arkansas, United States

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Cara Therapeutics Study Site

Bakersfield, California, United States

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Cara Therapeutics Study Site 2

Bakersfield, California, United States

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Cara Therapeutics Study Site

Canyon Country, California, United States

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Cara Therapeutics Study Site

Escondido, California, United States

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Cara Therapeutics Study Site

Lomita, California, United States

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Northridge, California, United States

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Cara Therapeutics Study Site

Riverside, California, United States

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Cara Therapeutics Study Site

Sacramento, California, United States

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Whittier, California, United States

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Cara Therapeutics Study Site

Denver, Colorado, United States

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Cara Therapeutics Study Site

Washington D.C., District of Columbia, United States

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Cara Therapeutics Study Site

Edgewater, Florida, United States

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Hialeah, Florida, United States

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Hollywood, Florida, United States

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Lake Worth, Florida, United States

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Cara Therapeutics Study Site 1

Miami, Florida, United States

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Cara Therapeutics Study Site 2

Miami, Florida, United States

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Cara Therapeutics Study Site

Ocala, Florida, United States

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Orlando, Florida, United States

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Tampa, Florida, United States

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Cara Therapeutics Study Site

Temple Terrace, Florida, United States

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Cara Therapeutics Study Site

Augusta, Georgia, United States

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Cara Therapeutics Study Site

Sandy Springs, Georgia, United States

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Cara Therapeutics Study Site

Crystal Lake, Illinois, United States

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Cara Therapeutics Study Site

Evanston, Illinois, United States

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Iowa City, Iowa, United States

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Metairie, Louisiana, United States

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New Orleans, Louisiana, United States

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Zachary, Louisiana, United States

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Baltimore, Maryland, United States

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Cara Therapeutics Study Site

Takoma Park, Maryland, United States

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Cara Therapeutics Study Site

Flint, Michigan, United States

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Cara Therapeutics Study Site 2

Flint, Michigan, United States

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Cara Therapeutics Study Site

Roseville, Michigan, United States

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Cara Therapeutics Study Site

Saint Clair, Michigan, United States

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Cara Therapeutics Study Site

Kansas City, Missouri, United States

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Cara Therapeutics Study Site

Brooklyn, New York, United States

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Cara Therapeutics Study Site

Mineola, New York, United States

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Cara Therapeutics Study Site

Rocky Mount, North Carolina, United States

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Cara Therapeutics Study Site

Columbus, Ohio, United States

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Cara Therapeutics Study Site

Norman, Oklahoma, United States

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Cara Therapeutics Study Site

Camp Hill, Pennsylvania, United States

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Cara Therapeutics Study Site

Providence, Rhode Island, United States

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Cara Therapeutics Study Site

Warwick, Rhode Island, United States

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Cara Therapeutics Study Site

Greenville, South Carolina, United States

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Cara Therapeutics Study Site

Rapid City, South Dakota, United States

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Cara Therapeutics Study Site

Corsicana, Texas, United States

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Cara Therapeutics Study Site

Gonzales, Texas, United States

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Cara Therapeutics Study Site

Houston, Texas, United States

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Cara Therapeutics Study Site

Houston, Texas, United States

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Cara Therapeutics Study Site

Plano, Texas, United States

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Cara Therapeutics Study Site

San Antonio, Texas, United States

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Cara Therapeutics Study Site

San Antonio, Texas, United States

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Cara Therapeutics Study Site

Alexandria, Virginia, United States

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Countries

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United States

Provided Documents

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Document Type: Study Protocol

View Document

Document Type: Statistical Analysis Plan

View Document

Other Identifiers

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CR845 210301

Identifier Type: -

Identifier Source: org_study_id

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