Minecraft wiki entry for Damage, associated text: Instant Damage caused by potions or tipped arrows can damage the player 6 at level I and 12 × 6 at level II. This damage occurs instantaneously. Undead mobs are instead healed, but are similarly damaged by the Healing effect. Zombified piglins that are splashed by a instant damage potion do not attack the player who threw it, as it heals them.