Addiction is a brain disease; it is true because drug, alcohol and any other illegal drink is directly affecting your brain. The brain changes range from fundamental and long-lasting changes in the biochemical makeup of the brain. The same techniques reveal how addiction harms or even kills brain cells. This process called aptosis, where cells in the brain self-destruct. The brain mechanisms through drugs acutely modify mood, memory, perception, and emotional states. Repeatedly using over time changes brain structure and function in fundamental that can persist long after the individual stops using them.

The brainstem is the most primitive structure at the base of your brain. The occipital lobe receives information from your eyes. An addictive substance alters this system by short-circuiting the biological processes that result in sensations of pleasure or satisfaction. In the brain in the right amount or dose, these drugs lock into receptors and start an unnatural chain reaction of electrical charges. Some drugs lock onto the neuron and act like a pump. The first time someone uses a drug of abuse. But the brain starts changing right away as a result of the unnatural flood of neurotransmitters. Larger amounts of the drug are needed to create a dopamine flood or high, an effect known as tolerance.

There are many biological factors that are involved with the addicted brain. In the brain, there are many changes that take place when drugs enter a person's blood stream. Drugs seem to cause surges in dopamine neurotransmitters and other pleasure brain messengers. Many rehabilitation centers have used classical conditioning to rehabilitate drug addicts. Through all of the research done about drug addiction and it is direct affects on the brain and find how drug addiction is considered a brain disease. Addiction is characterized by the continued use of a substance despite physical and mental problems.

The substance-dependent brain is physiologically and chemically different from the normal brain. The brain's job is to process information. The addictive substance causes physical changes to certain nerve cells in the brain. All drugs of abuse, such as nicotine, cocaine, and marijuana, primarily affect the brain's limbic system. The brain adapts by lowering the body's natural supply of the internal neurotransmitter. All of the major substances of abuse, including alcohol, psycho stimulants, nicotine, and opiates, increase dopamine levels. So the addiction is a brain disease that affect to the brain.