What is addiction? Addiction is a primary, chronic disease of brain reward, motivation, memory and related circuitry. Dysfunction in these circuits leads to characteristic biological, psychological, social and spiritual manifestations. This is reflected in an individual pathologically pursuing reward and/or relief by substance use and other behaviors. Addiction is characterized by inability to consistently abstain, impairment in behavioral control, craving, diminished recognition of significant problems with one’s behaviors and interpersonal relationships, and a dysfunctional emotional response. Like other chronic diseases, addiction often involves cycles of relapse and remission. Without treatment or engagement in recovery activities, addiction is progressive and can result in disability or premature death.
- Inability to stop using drugs
- Poor behavioral control
- Constant craving for drugs
- Inability to recognize serious problems with behaviors and relationships
- Continued drug use despite negative consequences
THE IMPACT OF DRUGS ON THE BRAIN
Research shows that drugs interfere with the brain’s communication system.Our brains are the most complex organs in our bodies. The brain’s communications centers consist of billions of neurons, or nerve cells. Networks of neurons pass messages back and forth to different structures within the brain, the spinal column, and the peripheral nervous system. This intricate system regulates our thoughts, emotions and everything we do. Drugs interrupt these vital communications and reduce the brain’s ability to perform basic life functions. Research shows that drugs work in the brain by tapping into the brain’s communication system and interfering with the way nerve cells normally send, receive, and process information. Different drugs work in their own unique ways, but they are equally destructive. Some drugs, such as marijuana and heroin, activate neurons because their chemical structure mimics that of a neurotransmitter, sending abnormal messages through the brain. Other drugs, such as amphetamine or cocaine, disrupt communication channels by releasing abnormally large amounts of neurotransmitters.
HOW DRUGS TRICK OUR BRAINS
Drugs activate the brain’s reward system, producing a euphoric effect.Despite the havoc these drugs wreak in our brains, we are likely to keep using them once the cycle has begun. That’s because most drugs directly or indirectly target the brain’s reward system by flooding the circuit with dopamine, producing a euphoric effect. Drugs are more powerful than natural rewards because they can release two to ten times the amount of dopamine and the effects last much longer. And because our brains are hard-wired to remember and repeat activities that trigger this internal reward system, first use is often not the last. Teens are especially vulnerable to this effect because their still-developing brains are less effective at controlling powerful pleasure-seeking impulses.
DRUGS DAMAGE OUR BRAINS
Drug use compromises the long-term health of the brain and leads to addiction.Unfortunately, a drug’s short-term pleasure comes with long-term consequences. As drug use increases, our brains adjust to the overwhelming surges in dopamine (and other neurotransmitters) by producing less dopamine or by reducing the number of receptors that can receive signals. This means that, eventually, dopamine simply doesn’t work as well on the reward circuit of a drug abuser’s brain, and the ability to experience any pleasure is reduced. A person then takes drugs just to try and bring their dopamine function back up to normal — and larger amounts of the drug are needed to create the dopamine high, an effect known as tolerance. Drug abuse can alter the normal concentration of another neurotransmitter called glutamate, which works on the brain’s reward circuit and strongly affects the ability to learn. As the brain tries to adapt to this change, cognitive function can be impaired. Long-term drug abuse can also cause changes in habits or non-conscious memory systems, making users more susceptible to uncontrollable cravings even when the drug is not available. Over time, drug use and abuse severely compromises the long-term health of the brain and may lead to addiction, driving a compulsive pursuit of drugsand eroding a person’s self-control and ability to make sound decisions. This is the difficult cycle we must break.
HOW DRUGS AFFECT THE TEEN BRAIN
Adolescents are at greater risk of drug abuse and addiction than the general population.
DRUGS AND OUR HEALTH
The overall health implications of drug abuse on users — and on others around them — are far-reaching.The harm caused by drugs isn’t only to our brains. Imaging scans, chest X-rays, and blood tests show the damaging effects of drug abuse throughout the body. For example:
- Alcohol damages the cerebral cortex (responsible for problem solving and decision-making), the hippocampus (important for memory and learning), and the cerebellum (important for movement and coordination).
- Marijuana affects short-term memory and learning, the ability to focus attention, and coordination, as one’s heart rate and lungs; and can lower IQ if use starts as a teen.
- Cocaine use can cause severe heart, respiratory, nervous, and digestive system problems.
- Amphetamines can lead to high body temperature, serious heart problems and seizures.
- New drug trends like K2/Spice, “Bath Salts” and “Molly” can be dangerous because the ingredients are inconsistent. Many contain harmful additives, resulting in emergency room admissions and even death.