Hydrocodone is the most commonly prescribed painkiller in United States since it is the main ingredient in many narcotic drugs. In medical practice, it is used to manage moderate to severe pain and cough. It is an opioid and just like other opioid drugs, it is highly addictive when its use is prolonged. Most addicts start taking it after surgery or accidental injury to manage pain but end up becoming addicted to it. The drug binds with pain receptors, also known as opioid receptors present in central nervous system thus effectively weakening the transmission of pain signals. Taking the drug in higher doses can develop the feelings of euphoria that are desirable for the user. The desire to produce these feelings eventually leads to the development of addiction.