Zosano Pharma cuts staff 31%, the latest layoffs in a wave of biotech belt-tightening March 18, 2022 Auto Bot BioPharma, biopharma nl, California, Drug Delivery, FDA, Migraine, Pharma 0 Regulatory setbacks for a new migraine treatment have led Zosano Pharma to restructure, laying off about 31% of its staff. Zosano is one of several biotechs that announced cost-saving measures this week.