AstraZeneca Achieves Phase III Milestone with Nanobody Therapy for Myasthenia Gravis
SHERIDAN, WYOMING – July 25, 2025 – AstraZeneca has reported positive topline results from its Phase III PREVAIL trial evaluating gefurulimab, a complement C5-inhibiting nanobody, for the treatment of generalized myasthenia gravis (gMG). The investigational therapy met all primary and secondary endpoints, signaling a potential new contender in the highly competitive $20 billion gMG market.
Phase III Results Suggest Clinical Significance