Choke Arrows are a type of arrow and tool used for the Bow available at Garrett's disposal in Thief. On impact, the barrel releases a noxious and suffocating gas momentarily incapacitates the target, causing mild nausea and difficulty breathing. It costs 15 gold to purchase, and are low in stock.
They work on both humans and animals. Humans will start coughing and will temporarily be unable to detect you, though will be suspicious immediately. Animals are knocked out, allowing you to swoop safely. Just like Water Arrows they can extinguish open flame light sources, though they are less economical for that purpose.