Chloroform (3.5e Equipment)
From D&D Wiki
Originally developed as a surgical anesthetic, Chloroform has since found its way into the black market as an effective tool for abductions. To apply Chloroform, a potential user must soak a rag or similar absorbent item in the liquid, followed by grappling their opponent. With a successful pin, the chloroform messenger covers the mouth and nose, and the effect begins.
Type: Inhaled DC 17
Initial Damage: Unconsciousness for 1d6 minutes
Secondary Damage: Unconsciousness for 2d8 minutes