Grand Panacea is a potion added by Xeno's Reliquary. It instantly heals 12 points () of health and adds Regeneration II for 30 seconds, healing 1 point () every 12 ticks = 0.6 seconds. This is the strongest regeneration potion in all of Hexxit.
To use it, hold down the right mouse button. When consumed, the player is left with an Empty Vial.