Thranconia

Clerics can make healing potions (cure light, cure serious, cure critical, neutralize poison or remove disease) for 100gp and 1 week per spell level.

Magic-Users, Clerics and NPC Alchemists may create other potions as well, once they have gotten the formula (see research). These potions take 200gp and 2 weeks per spell level to create and usually require a special ingredient too.