CR845-CLIN3105: A Study to Evaluate the Safety and Effectiveness of CR845 in Hemodialysis Patients With Moderate-to-Severe Pruritus

Key Inclusion Criteria: To be eligible for inclusion into the study, a patient must meet the following criteria: * Has end-stage renal disease (ESRD) and has been on hemodialysis 3 times per week for at least 3 months prior to the start of screening; * Has at least 2 single-pool Kt/V measurements ≥1.2, or at least 2 urea reduction ratio measurements ≥65%, or 1 single pool Kt/V measurement ≥1.2 and 1 urea reduction ratio measurement ≥65% on different dialysis days during the 3 months period prior to screening; * Prior to Treatment: * Has completed at least 3 Worst Itching Intensity NRS questionnaires from the start of the Run-in Period up to and including the pre-dose assessment on Day 1; Key Exclusion Criteria: A patient will be excluded from the study if any of the following criteria are met: * Known noncompliance with dialysis treatment that in the opinion of the investigator would impede completion or validity of the study; * Scheduled to receive a kidney transplant during the study; * New or change of treatment received for itch including antihistamines and corticosteroids (oral, IV, or topical) within 14 days prior to screening; * New or change of prescription for opioids, gabapentin, or pregabalin within 14 days prior to screening; * Received another investigational drug within 30 days or five half-lives (whichever is longer) prior to the start of dosing or is planning to participate in another interventional clinical study while enrolled in this study; * Has pruritus only during the dialysis session (by patient report); * Is receiving ongoing ultraviolet B treatment and/or anticipates receiving such treatment during the study; * Participated in a previous clinical study with CR845.