Block the  effect - yeah gotta call bullshit on this, if they cant definitively say it will prevent cardiac arrest, then the symptoms they block are irrelevant. The problem is the method of envenomation and this, while it seems like amazing news, would need to be applied either prior to being stung or at the time of being stung. Like at the exact same fucking time. Being that the reaction that triggers envenomation only occurs when in contact with bilogical matter and even something as thin as pantyhose will protect you, would you wear a lycra suit, or rely on a product that *may* prevent your imminent heart attack?