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ZL 1503

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Drug Profile

ZL 1503

Alternative Names: ZL-1503

Latest Information Update: 29 Jun 2026

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At a glance

  • Originator ZAI Lab
  • Class Anti-inflammatories; Bispecific antibodies; Immunotherapies; Skin disorder therapies
  • Mechanism of Action Interleukin 13 receptor antagonists; Interleukin 31 receptor antagonists
  • Orphan Drug Status

    Orphan designation is assigned by a regulatory body to encourage companies to develop drugs for rare diseases.

    No
  • New Molecular Entity Yes

Highest Development Phases

  • Phase I Atopic dermatitis

Most Recent Events

  • 22 Jun 2026 Zai Lab plans a phase I trial (In volunteers) in New Zealand in September 2026 (SC, IV) (NCT07658482)
  • 20 Apr 2026 Pharmacodynamics and adverse event data from a preclinical trial in Atopic dermatitis released by ZAI Lab
  • 13 Jan 2026 ZAI Lab plans a phase II trial for Atopic dermatitis

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