Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Multicenter, Double-blind, Randomized, Placebo-controlled Study to Evaluate the Safety and Efficacy of Intravenous CR845 in Hemodialysis Patients With Moderate-to-Severe Pruritus, With a 52-Week Open Label Extension
Brief Summary: This is a multicenter, randomized, double-blind, placebo-controlled study to evaluate the safety and efficacy of intravenous (IV) CR845 at a dose of 0.5 mcg/kg administered after each dialysis session. The study includes a 12-week Double-blind Phase and a 52-week Open-label Extension Phase.


Options:
A: Inclusion Criteria:

* Chronic kidney disease with moderate to severe uremic pruritus for longer than 2 months

Exclusion Criteria:

* pregnancy history of photosensitivity photo-aggravated disease
B: Key Inclusion Criteria:

To be eligible for inclusion into the Double-blind Phase of 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 randomization:

  * Has completed Worst Itching Intensity NRS worksheets up to 8 days prior to 1st dose;
  * Has a mean baseline Worst Itching Intensity NRS indicative of moderate to severe uremic pruritus.
* To be eligible for inclusion into the Open-label Extension Phase of the study, each patient will have to fulfill the additional key following criteria at the time of entry into the Open-label Extension Phase:

  * Has received at least 30 doses of the planned 36 doses of study drug during the Double-blind Phase of this study;
  * Continues to meet inclusion criteria.

Key Exclusion Criteria:

A patient will be excluded from the Double-blind Phase of 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;
* 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;
* Has pruritus only during the dialysis session (by patient report);
* Is receiving ongoing ultraviolet B and anticipates receiving such treatment during the study;
* Participated in a previous clinical study with CR845.
* A patient will be excluded from the Open-label Extension Phase of the study if any of the additional key following criteria are met at the time of entry into the Open-label Extension Phase:

  * Completed the Double-blind Phase of this study but exhibited adverse events during the course of the Treatment Period that may preclude continued exposure to the study drug;
  * Was noncompliant with protocol procedures during the Double-blind Phase of this study which is indicative of an inability to follow protocol procedures.
C: Inclusion Criteria:

* Male or female patients 18 years of age to 70 years of age.
* A diagnosis of moderate to severe pruritus.
* At least 3 episodes of itch over a period of 2 weeks, each lasting for 2 minutes or more.
* Symptoms of itch in regular pattern over 6 months.
* Itch Visual analog scale (VAS) of 3cm or more out of 10 cm.
* All subjects will be end stage renal failure patients undergoing hemodialysis for at least 3 months, who have substantial pruritus for more than 6 months. Substantial pruritus is defined as persistent pruritus impairing sleep or daytime activity.
* Ability and willingness to follow all study procedures, attend all scheduled visits, and successfully complete the study
* The ability to understand and sign a written informed consent form, which must be obtained prior to treatment.

Exclusion Criteria:

* Presence of infection (as defined by the investigator) on the area to be treated.
* Subjects with history of pruritus predating renal failure and subjects with skin disease unrelated to uremia, such as atopic dermatitis, will be excluded.
* Use of systemic medications for treatment of pruritus including corticosteroids within the past 4 weeks and during the study.
* Use of topical medications for treatment of pruritus, including corticosteroids, within the past week.
* Pregnant women, women who are breast feeding, or women of child bearing potential who are not practicing an acceptable method of birth control (abstinence, birth control pill/patch, barrier with spermicidal jelly, IUD, etc.), as determined by the investigator. Acceptable contraception must be used during the entire study.
D: Inclusion Criteria:

* hemodialysis patients that refered to dialysis centers and at least on hemodialysis thrice weekly
* presence of uremic pruritus
* patients that at least had refractive pruritus that lead to sleep disorders or compromised daily activities
* patients should took a course of antipruritic treatment with no proper response

Exclusion Criteria:

* presence of pruritus less than three months
* kt/V less than 1.2
* presence of pruritus due to other cause other than uremic state
* presence of other pruritic diseases; malignancies; cholestasis; hepatitis B and C infection
* treatment with corticosteroid
* presence of anemia with hemoglobin less than 10

Answer: B