Codeine belongs to the opioid class of painkillers. The drug produces euphoric effects due to which it is commonly abused. Though it is not as addictive as the other opioid drugs, its habit-forming potential is still significant. According to a survey, there are about 1.9 million Americans who have a prescription medicine use disorder involving painkillers and Codeine is one of those painkillers. Abuse of the drug is common among masses. When the person starts taking the illicit or improper doses of Codeine, an addiction develops that can be very hard to control unless medically supervised. The drug stimulates the reward centers in the brain that create a sense of euphoria and intense feelings of pleasure. The abuse of Codeine can lead to physical and psychological dependence. After a prolonged use, a tolerance is developed for the substance and the user requires more of the dose to achieve the similar effects. A person’s addiction to the drug develops with the increasing levels of tolerance. In some people, the addiction to Codeine can be set very quickly. An overdose can also occur, which is a life-threatening condition unless promptly treated.