Weakness Potion

On a quest in Cantha I was given a potion by a NPC, I drank it, and now my character continuously loses Health. Yes, I realize it was stupid to drink the potion, but now that its been done, how can the effect be reversed.

Thanks.

Adrian The Myth

That is a quest given by the Am Fah. In order to remove it you must abandon the quest in a town or complete the quest.

I went back to the market (that damn place is a maze), found someone who could guide me (the quest was gone from my list). This person had seen it before - Drink from the Chalice quest. Found Tosai and completed the rest of the mission. The situation had me freaking. Thanks for your response.