Poison Resistance Potion is a Potion in Divinity: Original Sin 2
"This floral-scented potion is commonly called 'King's Pal'. It grants its drinker a gentle resistance to poisoning."
Poison Resistance Potion is a potion that provides 15% Poison Resistance for three turns when consumed. It cannot be crafted, and it isn't clear if there is any way to obtain it in-game, although the higher level Poison Resistance potions can be found or purchased from merchants.