Poison is an element in Final Fantasy VIII. It is a rare element, opposed to Holy element, with only few abilities associated with it. Poison status does not deal Poison-elemental damage in Final Fantasy VIII though both Bio and Doomtrain also inflict the status. Human enemies are typically weak to it.
The player can protect against Poison damage with Elem-Def-J by junctioning some of the following spells: Ultima, Full-life, Shell, Life, and Bio. Out of these, Bio gives the best protection (1.5% per spell) and Shell gives the lowest (0.2%). The maximum protection is 100% absorption (200% of an element in Elem-Def-J).