Poisona

Poisona, (ポイゾナ, Poizona), also known as Antdot, Antidot, Pure, Esuna, or Panacea, is a White Magic spell that appears in various games in the series. It cures the Poison status.

Final Fantasy
Poisona, also known as PURE in the Famicom release and Esuna in the Origins release, is a level 4 White Magic spell which removes the Poison status effect from a single ally.

The spell can be bought at Elfheim and can be learnt by the White Mage, White Wizard, Red Mage, and Red Wizard Job classes. In the Dawn of Souls and 20th Anniversary Edition releases it costs 3 MP to cast.

Final Fantasy III
Poisona or Pure is a level 1 White Magic spell, and is the first buyable spell in the game, bought in Ur.

Final Fantasy IV
Panacea, originally called Remedy, is not a player ability, but an ability used by enemies that restores the status of the party oddly enough. It is used by Dr. Lugae. The spell Poisona is the spell used when a character uses a Staff as an item, which removes Poison from one target.

Final Fantasy V
Poisona, also known as Antidot, is a level 1 White Magic spell and costs 2 MP to cast. It can be bought in Tule, Kerwin, Karnak, and Jachol for 90 gil.

Final Fantasy VI
Poisona, also known as Antdot, can be learned naturally by both Terra and Celes (Terra at Level 6 and Celes at Level 8), and Kirin teaches the spell at a rate of x4. It costs 3 MP to cast.

Final Fantasy VII
Poisona is obtained by equipping a Heal Materia. It costs 3 MP to cast.

Final Fantasy IX
Panacea can be learned by Garnet and Eiko though the Air Racket and Rod for 15 AP. Panacea also cures Venom, along with Poison. It costs 4 MP to cast.

Final Fantasy X
Panacea appears as a item from Rikku's Overdrive, Mix. It has the same effect as Remedy, but over the entire party.

Final Fantasy XI
Poisona is a low-level WHM spell. Scholars can also cast it via Addendum: White.

Final Fantasy XII
Poisona is obtained from the White Magick 2 License, both in the original version and the International Zodiac Job System version - in which it can be learned by the Job classes White Mage and Red Mage, though a Red Mage must obtain the Quickening license first.