It is suggested it be used on Razmire Keelgan so he will always be coherent for the player and open his general and builder's stores. When used on an afflicted villager, they will turn into Mort'ton locals and reward the player with items like Olive oil, Tarromin, and Coins. Although it is a "permanent" cure, the villagers will always return to their afflicted state, except for Razmire and Ulsquire Shauncy when talked to. Therefore, there is no way to permanently "clean up" Mort'ton.