A Multicenter, Randomized, Double-blind, Placebo-controlled Phase IIa Study to Explore the Efficacy, Safety, and Pharmacokinetic Profile of HWH486 in Adults With Chronic Spontaneous Urticaria(CSU)
This is a multicenter, randomized, double-bind and placebo-controlled phase IIa dose-finding study to assess the safety and efficacy of HWH486 in adults with chronic spontaneous urticaria (CSU). In addition, the pharmacokinetic characteristics will also be investigated.
• Age ≥18, ≤70 years old;
• Participants with chronic spontaneous urticaria (CSU) at the time of randomization as defined by the following: presence of itch and hives for ≥ 6 consecutive weeks prior to screening, despite second generation H1-antihistamine during this period; Urticaria Activity Score (UAS7) (range 0-42) ≥16, Hives Severity Score (HSS7) (range 0-21) ≥ 6 and Itch Severity Score (ISS7) (range 0-21) ≥ 6 during 7 consecutive days prior to randomization; CSU duration ≥6 months prior to screening (defined as the onset of CSU as determined by the investigator based on all available supporting documentation).
• Willing and able to complete the Urticaria Participant Daily eDiary (UPDD) for the duration of the study;
• Willing to take background medication and emergency medication according to the study protocol.
⁃ 6\) Written informed consent signed voluntarily by the patient or their legal representatives.