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FDA's Streamlined Nonclinical Safety Guidance for Monoclonal Antibodies: What It Means for Regulatory Affairs Professionals in 2026
In December 2025, the US Food and Drug Administration (FDA) published draft guidance — "Monoclonal Antibodies: Streamlined Nonclinical Safety Studies" (Docket FDA-2025-D-4634) — recommending that sponsors of monospecific monoclonal antibodies (mAbs) can reduce or eliminate long-duration animal toxicology studies, including in nonhuman primates (NHPs), where a robust weight-of-evidence (WoE) risk assessment supports doing so. It affects any company developing single-target mAb
1 day ago11 min read