Ring of Anti-Venom

Ring of Anti-Venom provides the wearer of the ring complete immunity to all kinds of poison. This item appears in Baldur's Gate II: Throne of Bhaal and Baldur's Gate II: Enhanced Edition. It's dropped by the lich in Amkethran in the side-quest to restore Marlowe's daughter.

In-game description
"This ring is an unadorned silver band. However, its plain appearance belies the powerful magic within. A Ring of Anti-Venom is eagerly sought after by royalty, influential political figures and other potential assassination targets."