The term 'Numbing Agent' can be defined as a substance that is used to reduce or eliminate sensation in a specific area of the body. Two common examples of numbing agents are ETHER and Novocaine. ETHER is a volatile, flammable liquid that has been used as an anesthetic since the mid-19th century. Novocaine is a brand name for the drug procaine, which is a local anesthetic that is injected into the skin to numb a specific area. Both ETHER and Novocaine are effective numbing agents that can be used to reduce pain during medical procedures.