I'm looking to make a spell that works like hair of the dog hangover cure, has a 10 minute casting time, and is only available to Witches and Druids, only alleviates Ex and Su abilities, requires the creatures inanimate body that bestowed the condition as the material component and is consumed in the process. What level should this spell be, what schools, and what else should be required?
Probably conjuration... Maybe level 3.