Pepper spray is also known as OC Pepper Spray - from "Oleoresin Capsicum".  It is also referred to as OC gas, capsicum spray, or oleoresin capsicum).  OC Pepper Spray is a chemical compound that irritates the eyes to cause tears, pain, and even temporary blindness.  It is sometimes used in riot control, crowd control, and personal self-defense, including defense against dogs and bears.

OC Pepper spray is an inflammatory and it will cause immediate closing of the eyes, difficulty breathing, runny nose, and coughing. The duration of its effects depend on the strength of the spray used.. .but the average full effect lasts around thirty to forty-five minutes, with diminished effects lasting for hours

Pepper spray typically comes in canisters, which are often small enough to be carried or concealed in a pocket, purse or keychain.