Complex sentence: The poison, a sodium channel blocker, paralyzes the muscles while the victim stays fully conscious (thus making the effects somewhat similar to those of the nerve agents Sarin and VX); the poisoning victim is unable to breathe, and eventually dies from asphyxiation.
Split into simpler sentences: The poison, a sodium channel blocker, paralyzes the muscles while the victim stays fully conscious (thus making the effects somewhat similar to those of the nerve agents Sarin and VX). The victim is unable to breathe, and eventually dies from asphyxiation.