Arrowhead Pharmaceuticals Inc.’ share priced dropped by more than 26% to $4.5 on early trading on NASDAQ on Nov. 11 following news that the US FDA has placed on clinical hold Heparc-2004, a Phase IIb study of ARC-520, its investigational therapeutic vaccine for the treatment of chronic hepatitis B virus (HBV) infection.
Though still to be confirmed in writing, the company said it had been told verbally by the agency that the...





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