Abstinence is an intentional choice not to use alcohol or drugs, or to abuse medications. It is a commitment many people make when they want to overcome an addiction.

Addiction is physical dependence on a drug and compulsive using behavior that causes problems in many life areas.

AIDS (acquired immunodeficiency syndrome) is an incurable disease caused by a virus (see HIV). It can be passed on through sexual contact or injection drug use. When someone has AIDS, it means the virus has affected the body's ability to fight diseases. It can be fatal. New medications can be life-saving if HIV/AIDS is detected and treated.

Assessment is a standard set of questions that help doctors, counselors, or other providers tell how severe a person’s drug problem is. It lets them know what treatment approach is best and what other services are needed.

Belief system is a set of ideas and thoughts people hold as true about themselves and the world around them. These include beliefs about what is right or wrong. Individuals, groups, communities, and cultures can have belief systems that influence the way they see things.

Benzodiazepines are a group of addictive medications used for anxiety. They have sedative and relaxing effects. These drugs include Valium, Ativan, and others. They can be fatal when mixed with some medications used to treat opioid use disorder.

Cognitive behavioral therapy (CBT) is a type of counseling that works well for people with drug problems. The counselor helps the person change the thoughts and feelings that lead to using. Then they practice new coping skills.

Cognitive skills are thinking skills. They include the ability to learn, to put ideas together, to remember, and to communicate. Cognitive skills are used to solve problems and make decisions.

Cold turkey is a term for quitting opioids with no medical help or preparation. It involves abruptly stopping drug use in an effort to quit for good. The term refers to one of the symptoms of withdrawal, "goose flesh" (horripilation).

Complementary treatments are helpful things like vitamins, yoga, or exercise. People may do them along with their drug treatment and as an ongoing part of their recovery.

Confidentiality in drug treatment is governed by law. It means information about people in drug treatment is private and cannot be given out without permission.

Counseling in addiction treatment usually includes working on a treatment plan and checking in on progress. It teaches skills that help people stay away from drug use. It also helps people work out other problems and connects them to other services as needed.

Craving is an urgent, overpowering need to use a substance. Anxious, depressive, or negative feelings usually go along with it. The urges are intense because they are related to changes in the brain that result from addiction.

Dependence is a physical change that the body goes through when it gets used to having a substance. Once it happens, people have withdrawal symptoms when they stop or rapidly decrease the drug.

Detox/Detoxification is supervised stopping of drug use. Medications are often used for a short period to help and medical supervision is often required.

Drug interaction is when two drugs do not mix well when they are taken together. Drug interactions can be very dangerous. A prescription medication can interact with a street drug or two or more prescriptions can interact, as can two or more street drugs.

ECG/EKG is an electrocardiogram. It is a test that measures the electrical activity of the heart to see if it is functioning normally.

Heart problems include a change in the heartbeat that puts people at risk for abnormal heart rhythm and sudden death. Methadone use increases the risk of this kind of problem.

Hepatitis C virus (HCV) is an infectious disease that affects the liver. There is a high rate of HCV infection among people who use drugs. It can be passed to others. Some of the ways it gets passed include tattooing, sharing razors, and especially sharing needles, spoons, and other things used to inject drugs. There is also a small risk of getting it through sexual contact with a person who has it. A simple and quick blood test can tell if someone is infected.

Hereditary means something is passed down from parents to children. Each parent gives a set of genes to their children. The genes determine eye color, hair color, and can make children prone to the same illnesses as their parents.

Highly motivated describes people who are ready to make a change. They have important reasons for doing so and are committed. Motivation can change as people become more certain they want to stop using.

HIV (human immunodeficiency virus) is an infection that can lead to AIDS. It is a virus that can be passed on to someone through sexual contact or though sharing needles, spoons, and other things used to inject drugs. A simple and quick test can tell if someone is infected with HIV. When people know they have it, they can get treatment.

Induction is the beginning of MAT, when people start the medication and get used to it.

Infectious diseases are also called communicable diseases because they can spread among groups of people. They are caused by things like bacteria and viruses on shared drug paraphernalia.

Inpatient or residential treatment programs are centers where people live for a period of time while they get counseling and support. Some programs are long-term and offer housing and other services.

Intensive outpatient treatment programs are recovery services people can attend 3–5 times a week for several hours while living at home. They treat severe to moderate substance addiction.

Interferon is a medication used to treat Hepatitis C virus (HCV).

Liver function tests are blood tests that check how well the liver is working.

Maintenance is the long-term part of MAT. People in maintenance may stay on medication for a long time or they may gradually cut down their dosage under medical supervision.

Mutual aid groups are also known as self-help groups. They are made up of people recovering from addiction who help and support each other. Peer support groups like AA and NA are one type of mutual aid group.

Neonatal abstinence syndrome (NAS) is something that happens with babies born to mothers who are using opioids. The infant goes through some degree of withdrawal after birth, which can require medical care. This also can occur when the mother is receiving MAT. About half of the time medical care is required before the infant goes home.

Opiates are a class of drugs that come from the opium poppy, but many people use the word to mean all drugs that belong to the same class, including synthetic opioids.

Opioid drugs are synthetic or natural substances that have a very specific action on the brain and body. They are often used in medicine to relieve pain. They create a feeling of well-being, have sedating effects, and can easily result in physical addiction. Large doses can cause respiratory failure and death.

Outpatient treatment services are often scheduled weekly and may include both group and individual counseling.

Peer recovery support services are provided by a person in recovery. They can include coaching or mentoring, assistance locating housing and employment, and support developing a recovering social network. They are usually offered by Peer Specialists through a recovery community organization or treatment center.

Peer support is when people who are in recovery from addiction give and receive help to others in or seeking recovery.

Prenatal care is working with a doctor and others to take care of yourself and your baby during pregnancy.

Prescribed medications are given to you by a doctor to help with a medical problem. For opioid use disorder, they include methadone, buprenorphine, and naltrexone.

Providers are professionals who give services to people in need of drug and alcohol treatment and other health-related services.

One way of defining recovery is as a process of change through which people work to improve their health and well-being, live a self-directed life, and strive to achieve their full potential. Many people with addiction achieve recovery by abstaining from alcohol and illegal or non-medically required drug use.

Recovery community is made up of people and families who are in recovery from drug and alcohol problems. They share common interests and activities. They support each other and serve as a voice of recovery in the greater community. They sometimes form advocacy or support organizations.

Recovery lifestyle begins when people choose to try and overcome a problem with substances and live a healthier and more fulfilling life, often by adding new goals, activities, and social connections.

Recovery pathways are individual routes to overcoming addiction. There is no one single pathway to recovery and no single definition of recovery that works for everyone. People find their recovery pathway by looking at what has worked for others and trying out approaches they think might work for them.

Recovery skill building is learning strategies and skills to avoid risky situations, seek help when one is having difficulty and/or experiencing cravings or a desire to use, and learning to cope with challenges without using drugs or alcohol.

Recovery supports are people, places, and things that help with staying clean and sober. Each person has different needs such as rides, housing, childcare, job training, or social contacts.

Relapse is a setback that people who are trying to stop using drugs sometimes go through. It can begin with a lot of stress, on top of triggers that lead to cravings. This is often followed by a breakdown in coping skills and isolation from supportive people. Eventually the result is a return to substance use.

Screening is a way of identifying people who may have a problem or condition. When people are screened, it usually means they have some signs that require a closer look.

Sexual problems can include having less than normal interest in sex. Women may have a hard time reaching orgasm and men may have difficulty becoming aroused.

Stabilization is when the person is on the right dose of medication and has adjusted to it.

Stigma is when someone is judged harshly or discriminated against because of their addiction or because of their choice of treatment.

Stress is a feeling of anxiety or worry in your life. Stress is often caused by problems with money, health, relationships, work, housing, and other pressures.

Sudden cardiac death is caused when the electrical system to the heart functions abnormally. The heart is not able to keep blood moving through the body.

Support system is the combination of people and things that help a person get in and stay in recovery.

Thought patterns are set ways of thinking. Sometimes they center on a set of assumptions that may or may not be true. For example: If I can’t get high, I’ll never be able to have fun again. Often changing thought patterns is part of changing behavior.

Tolerance is the body’s adaptation to regular use of a drug. As the body gets used to having the drug, one or more of the drug’s effects decrease over time. It begins to take larger amounts to get the desired effect.

Trauma is an experience that a person finds threatening and frightening, that may have a long-lasting effect. Trauma can relate to childhood experiences such as sexual abuse, domestic violence, or loss, or to later experiences, such as combat, street violence, domestic violence, or sexual assault. People who are addicted to substances or have a history of addiction often have traumatic past experiences that affect them in the present.

Treatment plan is a written document mapping out the approach that the client and the treatment provider have agreed to try.

Treatment programs are usually licensed. They provide counseling, groups, medications, and other services to people seeking help with drug and alcohol problems.

Urine retention is when people have a hard time urinating (peeing) or emptying their bladders.

Withdrawal is what happens when someone is physically dependent on a drug and stops taking it or decreases the amount abruptly. Withdrawal from opioids can be intensely uncomfortable.

Withdrawal symptoms are physical and psychological. They begin shortly after someone stops taking a drug they are physically addicted to. Most of the intense withdrawal symptoms improve with time.