User blog comment:- MHCaboose -/Monster Hunter Frontier Z Discussion/@comment-6050823-20160917131038/@comment-6050823-20160921194825

So the new poison can't be cured by Antidotes, however, it is cured by antidote dropped from Zenith Espinas's body (Don't even ask me how!) or a Zenith armor with a special skill that counters the poison.