Maybe they could change alchemy to lessen the affects of potions, more so for people who do not have alchemy or possibly create potions that could only be used by alchemists. An alchemist book of some type that might allow the alchemist types of potion spells. The ability to pour the liquid over things, like a lock or to remove a magic wall. Resistance buffers or even types of magics could have their affects reduced. Like drinking a potion of poison resistance could block poison or throw a potion of poisonous gas to poison your enemies. So, possibly a book of icons where you could master different potions.