Understanding how people become addicted to drugs is an essential first step in confronting what has become a national crisis. For the individual, it is a compelling need, regardless of its destructive potential. For families and society as a whole, it is among the most serious of challenges. Overdose, poor health, broken homes, violence, and child abuse are just some of its negative impact. In addition, the economic burden from alcohol, illicit drugs, and nicotine cost the nation over $600 billion every year, says the National Institute on Drug Abuse (NIDA).\nAddiction and the Brain\nHow do people get hooked on drugs? At its most basic level, it is a disease affecting how the brain communicates with itself. Drugs do this in two ways. Some \u2014 like narcotics and cannabis \u2014 mimic the brain\u2019s neurotransmitters. Methamphetamine, cocaine, and other stimulates overstimulate the brain\u2019s reward system, causing it to produce excessive dopamine \u2014 its pleasure neurotransmitter. Either way, the brain reinforces behavior \u2014 drug use \u2014 with dopamine-induced pleasure. Once a person is addicted, the brain believes it \u201cneeds\u201d this pleasure.\nOver time, it takes more drugs to achieve the desired effect. Believing it is supplying too much dopamine, the brain cuts back on its own production. Yet the reward system expects the same amount of this neurotransmitter, and the result is tolerance \u2014 where more of the drug is needed to maintain pleasurable dopamine levels.\nDrug addiction affects the brain in other ways. For example, another neurotransmitter called glutamate is also important in the brain\u2019s pleasure\/reward system. Glutamate is important to the brain\u2019s learning abilities, and drug-induced glutamate imbalances partly explain why addicts suffer cognitive damage over time.\nThe brain\u2019s reward system isn\u2019t the only area harmed by drugs. The NIDA says that images of the brain reveal areas responsible for judgment, decision-making, and behavior control are all damaged among drug addicts.\nBeyond the Brain\nAddiction is more than a chemical process in the brain. A number of combined risk factors increase the likelihood of abusing drugs in the first place while reinforcing their ongoing use.\nSuch biological factors as genetic predisposition, gender, ethnicity, or having a mental disorder affect an individual\u2019s vulnerability to drug abuse. Stress, a person\u2019s peer groups, a history of physical and sexual abuse, or socioeconomic status are among many environmental effects. Early drug addiction adversely influences adolescent brain development, and the younger a person begins the worse the drug problem becomes.\nLike many other chronic diseases, drug addiction is preventable. Prevention is in fact the single most effective approach. Ongoing outreach and education among vulnerable populations is essential. In spite of all of these compelling factors, drug addiction is a treatable disease. Whether it is nicotine, alcohol, heroin, or any other drug, help is available to those who want to quit.\nContact Western Psychiatric Institute and Clinic at 412-624-1000 for more information on addiction medicine, rehabilitation, and recovery.