What Factors Affect a Person's Likelihood of Becoming Addicted to Drugs?

Although we know what happens to the brain when someone becomes addicted, we can’t predict how many times a person must use a drug before that happens. A person’s unique genetic makeup and his or her environment both play a role. What we do know is that a person who uses drugs (including alcohol) risks becoming addicted, craving the drug despite its terrible consequences. In the end, if addiction occurs, it is extremely painful and difficult to quit regardless of what drug you take—but it can be done.