Poison

 causes status-oriented DEF to be reduced by 25%. If HP is over 25%, you will lose 1.5% + 2 HP of your max HP every second. SP Regeneration is disabled.

Abilities
The following abilities inflict :
 * [] - An NPC-exclusive skill that inflicts by chance.
 * Envenom
 * Venom Dust
 * Venom Knife
 * Poisoning Weapon
 * Poisoning Weapon (RO2)

Cure
can be cured through the following methods:
 * Green Herb, Green Potion, Panacea, Royal Jelly.
 * Jam Pancake, Honey Pancake, Mushroom Pancake, Caviar Pancake, and Sour Cream Pancake can remove the effect.
 * Thief's skill Detoxify can undo the effect.
 * Having high VIT and LUK will reduce amount of time this ailment affects you, as well as chance of being affected.
 * Priest's Slow Poison prevents damage taken from but does not cure the reduced DEF effect. It is a very rarely used counter.
 * Battle Chant initially removes all buffs and status effects from the Paladin who uses it, including.
 * One of Battle Chant's random effects removes all abnormal status effects from party members, including.
 * One of Battle Chant's random effects grants 60 seconds of immunity to all status effects to party members, including.
 * Dispel removes this ailment.
 * Mercenary's skill Recuperate can undo the effect.
 * Royal Guard's King's Grace can remove the effect.

Prevention
The following lists ways that can be prevented:
 * Argiope Card grants Poison element, and immunity to Poison attacks, but not the status itself.
 * Ghoul Card increases resistance to by 20%.
 * Poporing Card allows use of Detoxify (which cancels ).
 * Venomous Card has a 30% chance of inflicting to self and a 30% chance of inflicting  on the attacker when receiving physical damage.