What is a Substance Use Disorder?

  

 

 

A **substance use disorder (SUD)** is a medical condition in which a person continues to use a substance even when it is causing problems in their health, relationships, work, education, or daily life.

 

When assessing for a substance use disorder, mental health and medical professionals look for patterns such as:

 

* Trying to **cut down or stop** using the substance but being unable to do so.

* Experiencing **strong cravings** or urges to use the substance.

* Spending a lot of time obtaining, using, or recovering from the effects of the substance.

* Continuing to use the substance even when it causes **physical or psychological problems**.

* Continuing to use the substance even when it causes problems with **family, friends, or other relationships**.

* Having difficulties meeting responsibilities at **home, work, or school**.

* Developing **tolerance**, meaning more of the substance may be needed to achieve the same effect.

* Experiencing **withdrawal symptoms** when reducing or stopping use.

 

A diagnosis is based on a person's pattern of symptoms and how much the substance use affects their everyday life. **Having a substance use disorder does not define the whole person. ** With appropriate treatment, support, and understanding, people can work towards recovery.

## Substance Use Disorder: Diagnosis and Treatment

 

### Diagnosing Substance Use Disorders

 

A **substance use disorder (SUD)** is diagnosed by looking at a person's symptoms and how substance use affects their everyday life.

 

The DSM-5-TR uses **11 possible symptoms**. The severity is based on the number of symptoms present:

 

* **Mild:** 2–3 symptoms

* **Moderate:** 4–5 symptoms

* **Severe:** 6 or more symptoms

 

The diagnosis is not based only on how much of a substance a person uses. It also considers **loss of control, cravings, problems caused by substance use, and difficulty stopping or cutting down**.

 

### Treatments for Substance Use Disorders

 

Different treatments can help a person **reduce or stop substance use**.

 

#### Medication-Assisted Treatment

 

**Medication-assisted treatment (MAT)** combines medication with counseling or other behavioral therapies.

 

Medicines can help reduce **cravings, withdrawal symptoms, and the risk of returning to substance use**.

 

### Agonist Medications

 

**Agonist medications** activate the same or similar receptors in the brain as the addictive substance.

 

They can produce a **controlled and safer effect** and may reduce cravings and withdrawal symptoms.

 

For example, medications such as **methadone and buprenorphine** can be used to treat opioid use disorder.

 

### Antagonist Medications

 

**Antagonist medications** block receptors in the brain rather than activating them.

 

For example, **naltrexone** blocks opioid receptors. This can prevent opioids from producing their usual effects.

 

### Talking Therapy

 

Talking therapies can help people understand:

 

* Why they use substances

* What triggers their substance use

* How to manage cravings

* How to cope with stress

* How to develop healthier ways of dealing with problems

* How to prevent or manage relapse

 

Examples include **cognitive behavioral therapy (CBT)** and motivational approaches.

 

### Transcranial Magnetic Stimulation (TMS)

 

**Transcranial magnetic stimulation (TMS)** uses magnetic pulses to stimulate specific areas of the brain.

 

TMS is being studied and used in some areas of addiction treatment, but it is **not a standard treatment for every substance use disorder**. Its availability and evidence vary depending on the substance and clinical situation.

 

### Harm Reduction

 

**Harm reduction** aims to reduce the harmful effects of substance use, even when a person is not ready or able to stop using completely.

 

Harm-reduction approaches can include:

 

* Providing information about safer choices

* Preventing overdose

* Access to **naloxone** for opioid overdose

* Syringe services to reduce the spread of infections

* Connecting people with healthcare and treatment services

 

Harm reduction recognizes that **any step toward greater safety can be important**.

 

> **Recovery can look different for different people. Treatment, support, and harm reduction can all help reduce the harms associated with substance use. **

Substance-Related and Addictive Disorders

 

A person is more than their addiction. Understanding, treatment, and support can help people move towards recovery.

Different Classes of Substances

Many different types of substances can lead to problems with use. These include:

• Caffeine

• Alcohol

• Tobacco and nicotine, including cigarettes and vapes

• Opioids

• Hallucinogens

• Inhalants

• Sedatives, hypnotics, and anxiolytic medications

• Stimulants

• Other substances

What Is a Substance Use Disorder?

A substance use disorder (SUD) is a medical condition in which a person continues to use a substance even when it is causing problems in their health, relationships, work, education, or daily life.

When assessing for a substance use disorder, mental health and medical professionals look for patterns such as:

• Trying to cut down or stop using the substance but being unable to do so.

• Experiencing strong cravings or urges to use the substance.

• Spending a lot of time obtaining, using, or recovering from the effects of the substance.

• Continuing to use the substance even when it causes physical or psychological problems.

• Continuing to use the substance even when it causes problems with family, friends, or other relationships.

• Having difficulties meeting responsibilities at home, work, or school.

• Developing tolerance, meaning more of the substance may be needed to achieve the same effect.

• Experiencing withdrawal symptoms when reducing or stopping use.

A diagnosis is based on a person's pattern of symptoms and how much the substance use affects their everyday life. Having a substance use disorder does not define the whole person. With appropriate treatment, support, and understanding, people can work towards recovery.

 There is a lot of useful material here, especially for the history and awareness part of your book. I would, however, correct a few historical and terminology points before publishing. For example, SAMHSA was created in 1992, not 1971, although its predecessor agencies and the federal substance-use treatment system have a much longer history.

I would structure this as a broader “Substance-Related and Addictive Disorders Awareness” module, followed by your Easy Read SUD section.

Substance-Related and Addictive Disorders Awareness

A Short History

People have used substances for thousands of years.

Some substances were used for:

• Medicine

• Pain relief

• Religious or cultural purposes

• Recreation

• Social activities

Over time, people also began to understand that some substances could cause harm, dependence, addiction, and serious health problems.

Some Important Historical Points

Ancient times

Opium and cannabis have both been used by humans for thousands of years.

Opium was used as a medicinal substance in ancient civilisations.

Cannabis was also used for medicinal and other purposes in ancient cultures.

1800s

Doctors and scientists increasingly documented the harmful effects that alcohol and other substances could have on health.

1900s

The United States introduced different laws and policies to address alcohol and drug use.

One important example was the Prohibition Era, when the manufacture, sale, and transportation of alcoholic beverages were prohibited nationally from 1920 to 1933.

However, laws and criminal penalties did not eliminate substance use.

Over time, there was also increasing recognition that substance use disorders require healthcare, treatment, prevention, and recovery support.

---

The Development of Modern Treatment

The United States has developed different organisations and services to address substance use and mental health.

The Substance Abuse and Mental Health Services Administration (SAMHSA) was established in 1992.

SAMHSA works to improve mental health and reduce the impact of substance use and addiction in the United States.

The history of substance-use treatment in the United States goes back much further than SAMHSA.

---

From "Substance Abuse" to "Substance Use Disorder"

The language used to describe substance problems has changed.

The term "substance abuse" was commonly used in the past.

Modern healthcare increasingly uses the term:

Substance Use Disorder (SUD)

This language is preferred because it describes a health condition rather than labelling the person as an "abuser."

A person should not be defined by their diagnosis.

For example:

Person with a substance use disorder

is generally more person-centred than:

Substance abuser

---

What Is Substance Use Disorder?

A substance use disorder is a health condition in which a person's use of a substance causes significant problems or distress.

The substance may affect:

• Physical health

• Mental health

• Relationships

• Work

• Education

• Money

• Safety

• Everyday responsibilities

A person may want to reduce or stop using the substance but find it difficult to do so.

---

Common Features of Substance Use Disorder

A person may experience:

Loss of Control

The person may:

• Use more than they intended

• Try to stop but struggle

• Spend a lot of time obtaining or using the substance

Cravings

The person may experience a strong desire or urge to use the substance.

Tolerance

The body can become adapted to some substances.

The person may need more of the substance to produce the same effect.

Withdrawal

Some people experience physical or psychological symptoms when they reduce or stop using a substance.

Withdrawal symptoms depend on the substance and the person.

Some types of withdrawal can be medically dangerous.

Effects on Relationships

Substance use can cause problems with:

• Family

• Friends

• Partners

• Children

• Work colleagues

---

Major Categories of Substances

Different substances affect the brain and body in different ways.

They can be grouped into broad categories.

Stimulants

Stimulants generally increase activity in the central nervous system.

They may increase:

• Alertness

• Energy

• Heart rate

• Attention

Examples include:

• Cocaine

• Methamphetamine

• Prescription amphetamine medications

• Nicotine

Some stimulant medications are prescribed by healthcare professionals for conditions such as ADHD.

A medication being a stimulant does not mean that appropriate medical use is the same as substance misuse.

---

Depressants and Sedatives

Depressants generally slow activity in the central nervous system.

Some are prescribed to:

• Reduce anxiety

• Help with sleep

• Treat certain medical conditions

Examples include:

• Alcohol

• Benzodiazepines

• Barbiturates

• Some sleep medications

These substances can be dangerous when misused or combined with other substances.

---

Opioids

Opioids are substances that act on opioid receptors in the brain and body.

They can provide powerful pain relief.

Examples include:

• Heroin

• Oxycodone

• Codeine

• Fentanyl

Some opioids are important medical treatments.

However, opioids can also cause:

• Tolerance

• Dependence

• Overdose

• Substance use disorder

---

Cannabinoids and Hallucinogens

These substances can affect:

• Mood

• Sensory experiences

• Perception

• Thinking

• Awareness

Examples include:

• Cannabis

• LSD

• MDMA

• Ketamine

These substances do not all work in exactly the same way.

They should not be treated as one identical group simply because they can affect perception or mood.

---

Inhalants

Inhalants are chemicals whose vapours can be inhaled.

Examples include some:

• Solvents

• Aerosols

• Gases

• Household or industrial chemicals

Inhalant misuse can be extremely dangerous.

It can cause:

• Brain damage

• Organ damage

• Heart problems

• Breathing problems

• Loss of consciousness

• Sudden death

---

Substance Use Disorder and the DSM

The DSM-5-TR uses the term Substance-Related and Addictive Disorders.

Substance use disorders are diagnosed according to specific clinical criteria.

The DSM-5-TR includes substance-specific disorders, such as:

• Alcohol use disorder

• Opioid use disorder

• Stimulant use disorder

• Cannabis use disorder

• Sedative, hypnotic, or anxiolytic use disorder

• Tobacco use disorder

• Other substance-related disorders

A diagnosis depends on the person's pattern of symptoms and how substance use affects their life.

---

Substance Use Is Not Automatically Substance Use Disorder

This is an important point.

Using a substance does not automatically mean that someone has a substance use disorder.

A healthcare professional looks at:

• How often the substance is used

• How much is used

• Loss of control

• Cravings

• Consequences

• Effects on daily life

• Other symptoms

• The person's overall circumstances

A diagnosis requires more than simply knowing that someone has used a drug or alcohol.

---

Addiction and Stigma

People with substance use disorders can experience considerable stigma.

They may be called:

• Addicts

• Junkies

• Drunks

• Weak

• Selfish

• Bad

These labels can make people feel ashamed and may stop them from seeking help.

A more respectful approach is to say:

"A person with a substance use disorder."

The person is not their diagnosis.

---

Prevention, Treatment, and Recovery

Substance-related disorders can be prevented and treated.

Support may include:

• Education

• Prevention programmes

• Talking therapies

• Medication

• Medical treatment

• Peer support

• Family support

• Recovery services

• Help with housing and employment

Treatment should consider the whole person, including their physical health, mental health, relationships, and social circumstances.

---

Important Messages

Substance use disorders are health conditions.

Addiction is more complicated than simply lacking willpower.

Not everyone who uses a substance has a substance use disorder.

Different substances affect the brain and body differently.

Substance use disorders can occur alongside other mental-health conditions.

People with substance use disorders deserve respect and appropriate treatment.

Recovery is possible.

---

Easy Read Questions

Question 1

What does SUD stand for?

☐ Substance Use Disorder
☐ Social Understanding Difficulty
☐ Substance User Decision

Answer: Substance Use Disorder

Question 2

Is "substance use disorder" a medical term?

☐ Yes
☐ No

Answer: Yes

Question 3

Does everyone who uses a substance have a substance use disorder?

☐ Yes
☐ No

Answer: No

Question 4

What can happen with tolerance?

☐ The body can become used to a substance
☐ The person never wants the substance again
☐ The substance becomes harmless

Answer: The body can become used to a substance

Question 5

Can substance use affect relationships?

☐ Yes
☐ No

Answer: Yes

Question 6

Can someone have a substance use disorder and another mental-health condition?

☐ Yes
☐ No

Answer: Yes

Question 7

Can people recover from substance use disorders?

☐ Yes
☐ No

Answer: Yes

---

Optional Reflection Question

💬 Why is it important to use respectful language when talking about substance use disorders?

Think about:

• Stigma

• Shame

• Asking for help

• Treatment

• Recovery

• Respect

---

Why This Module Matters

Learning about substance-related and addictive disorders helps students, professionals, families, carers, and people themselves understand that substance use is not simply a question of being "good" or "bad."

Understanding the science can help us:

• Recognise health risks

• Understand addiction

• Reduce stigma

• Identify when someone may need help

• Understand co-occurring mental-health conditions

• Support treatment and recovery

Key Message

A substance use disorder is a health condition, not a definition of who a person is. Understanding, treatment, and support can make recovery possible.

Easy Read Module: Substance-Related and Addictive Disorders

 

Why Are Addictive Disorders a Special Case?

Substance-related and addictive disorders are important areas of psychology because they can affect:

• The brain

• The body

• Emotions

• Behaviour

• Relationships

• Work and education

• Everyday life

Addiction can change how the brain's reward, motivation, learning, and decision-making systems work.

This can make it difficult for some people to control their substance use, even when they understand that it is causing harm.

---

Addiction Can Be a Long-Term Health Condition

Substance use disorders can be chronic conditions.

This means that some people may need treatment and support over a long period of time.

This does not mean that a person cannot recover.

Many people improve, stop using substances, or manage their condition successfully with appropriate treatment and support.

Recovery can involve:

• Treatment

• Support

• Lifestyle changes

• Medication when appropriate

• Counselling

• Peer support

• Long-term follow-up

---

Why Can People Return to Substance Use?

Some people return to substance use after trying to stop.

This is sometimes called relapse or return to use.

Returning to substance use does not mean that treatment has completely failed.

It can mean that the person needs:

• More support

• A change in treatment

• Help with triggers

• Help with stress

• Additional mental-health support

• Another recovery plan

Recovery is not always a straight line.

Important Message

A return to substance use is a reason to provide more support, not a reason to give up on someone.

---

Addiction and Other Mental Health Conditions

Some people have both a substance use disorder and another mental health condition.

This is sometimes called a co-occurring disorder or comorbidity.

Conditions that can occur alongside substance use disorders include:

• Depression

• Bipolar disorder

• Anxiety disorders

• PTSD

• Schizophrenia and other psychotic disorders

• Other mental health conditions

The relationship can be complicated.

For example:

• Mental-health difficulties may increase the risk of problematic substance use.

• Substance use can make mental-health symptoms worse.

• Substance use can sometimes cause symptoms that look like another mental-health condition.

• Both conditions may be influenced by shared risk factors.

This is why a proper professional assessment is important.

---

Treating Both Conditions

When someone has a substance use disorder and another mental-health condition, it is important to consider both problems.

Treatment can include:

• Treatment for the substance use disorder

• Mental-health treatment

• Talking therapies

• Medication when appropriate

• Recovery support

• Family support

• Help with housing, employment, and other practical needs

Treating co-occurring conditions together can help provide more complete care.

---

Behavioural and Talking Therapies

Talking and behavioural therapies can help people:

• Understand their triggers

• Manage cravings

• Develop coping skills

• Change harmful patterns

• Improve relationships

• Develop healthier ways of dealing with stress

Treatment can be provided individually or in groups.

---

Medication

Medication can be useful for some substance use disorders.

Depending on the substance and the person's circumstances, medication may help:

• Manage withdrawal

• Reduce cravings

• Reduce the risk of returning to substance use

• Support long-term recovery

Medication should be prescribed and monitored by an appropriate healthcare professional.

---

Addiction and Stigma

People with addiction are sometimes judged as:

• Weak

• Lazy

• Selfish

• Bad

• Lacking willpower

These labels can increase shame and may make people less willing to seek help.

Addiction is more complicated than simply choosing to use a substance.

At the same time, understanding addiction does not mean ignoring harmful behaviour.

People can be held responsible for their actions while still receiving appropriate healthcare and support.

---

Important Messages

Remember:

Addiction can affect the brain and behaviour.

Substance use disorders are real health conditions.

Some people need long-term treatment and support.

People can have both addiction and another mental-health condition.

Both conditions need to be taken seriously.

Returning to substance use does not mean recovery is impossible.

Treatment and recovery are possible.

A person is more than their addiction.

---

Easy Read Questions

Question 1

Why can addiction make stopping difficult?

☐ It can affect brain systems involved in reward, motivation, and decision-making
☐ People simply do not care
☐ Addiction is only about personality

Answer: It can affect brain systems involved in reward, motivation, and decision-making.

---

Question 2

Can substance use disorders be long-term conditions?

☐ Yes
☐ No

Answer: Yes

---

Question 3

Can someone have both a substance use disorder and another mental-health condition?

☐ Yes
☐ No

Answer: Yes

---

Question 4

What does co-occurring disorder mean?

☐ Two or more conditions occurring in the same person
☐ Never having a mental-health condition
☐ Having two different medicines

Answer: Two or more conditions occurring in the same person.

---

Question 5

Can treatment include talking therapies?

☐ Yes
☐ No

Answer: Yes

---

Question 6

Can medication help some people with substance use disorders?

☐ Yes
☐ No

Answer: Yes

---

Question 7

Does returning to substance use mean that recovery is impossible?

☐ Yes
☐ No

Answer: No

---

Optional Reflection Question

💬 Why is it important to treat addiction and other mental-health conditions without judgement?

Think about:

• Stigma

• Asking for help

• Co-occurring conditions

• Treatment

• Recovery

• Respect

---

Why This Module Matters

Understanding addiction as a health condition can help students and professionals:

• Look beyond stereotypes

• Understand why substance use can become difficult to control

• Recognise co-occurring mental-health conditions

• Understand the importance of treating the whole person

• Reduce stigma

• Support recovery

Key Message

Addiction can change how the brain and behaviour work, but addiction does not define the person. With appropriate treatment and support, recovery is possible.

Why This Module Matters

  

 

Understanding substance-related and addictive disorders can help students and professionals:

 

* Recognize addiction as a health issue

* Understand why stopping can be difficult

* Reduce stigma

* Recognize the importance of professional support

* Understand the relationship between addiction and mental health

* Support people without judging them

 

## Key Message

 

> **A person is more than their addiction. Understanding, treatment, and support can help people move towards recovery. **

 

Personality Disorders and Stigma

 

Personality disorders can be misunderstood.

 

Words such as **"narcissist," "borderline," "paranoid,"** and **"antisocial"** are sometimes used casually on social media.

 

A person should not be labelled with a personality disorder because they:

 

* Have an argument

* Get angry

* Want attention

* Avoid people

* Are suspicious

* Like things organized

* Act selfishly

* Have a difficult relationship

 

A clinical diagnosis requires much more than one behavior or personality trait.

 

## Key Message

 

> **A diagnosis is not a person's identity. **

 

People with personality disorders are individuals with their own:

 

* Strengths

* Feelings

* Experiences

* Relationships

* Needs

* Goals

* Support requirements

 

Understanding the condition should help us **reduce stigma rather than create another label.**

Why don't doctors use Asperger's as a separate diagnosis anymore?

 

The main reason is that research found it difficult to reliably separate Asperger's disorder from other forms of autism as a distinct condition.

Under the older DSM system, there were separate diagnoses such as:

• Autistic disorder
• Asperger's disorder
• Pervasive developmental disorder-not otherwise specified (PDD-NOS)

When the DSM-5 was published in 2013, these separate diagnoses were brought together under one diagnosis:

Autism Spectrum Disorder (ASD).

The idea is that autism is a spectrum, with people having different combinations and levels of support needs.

What happened to people who already had an Asperger's diagnosis?

This is an important distinction.

Someone who was diagnosed with Asperger's disorder before DSM-5 did not suddenly stop being autistic when the diagnostic manual changed.

Their previous diagnosis remains part of their personal medical and developmental history.

Under current DSM-5-TR practice, a person who would previously have received an Asperger's diagnosis may instead meet criteria for Autism Spectrum Disorder, with additional information describing their abilities and support needs.

Asperger's and autism: what was similar?

The older Asperger's diagnosis included difficulties involving:

• Social interaction
• Social communication
• Understanding social cues
• Restricted or highly focused interests
• Repetitive behaviours or routines

These overlap considerably with autism spectrum disorder.

People diagnosed with Asperger's were generally described as having no significant early language delay and often having average or above-average intellectual ability.

But autistic people can also have average or above-average intelligence and strong language skills.

That overlap was one of the reasons the separate Asperger's category became difficult to maintain.

What is different today?

The modern approach focuses less on putting someone into a particular autism "type" and more on understanding their individual characteristics and support needs.

For example, an autistic person may have:

• Strong verbal abilities but difficulty with social communication
• Significant sensory sensitivities
• Difficulties with executive functioning
• Repetitive movements or routines
• Highly focused interests
• Difficulties with everyday independence
• A need for substantial support

Another autistic person may have a very different combination of characteristics.

Both are autistic, but their support needs can be very different.

A really important point for your book

I would also update one part of the older OpenStax material.

The passage you found says autism is characterised by deficits in social interaction and communication. That reflects older clinical language, but current understanding is more nuanced. Many autistic people and modern clinicians prefer language that describes differences in social communication and interaction rather than implying that autistic people simply lack social abilities.

Also, the older passage says that autism causes "serious impairments." Current DSM-5-TR criteria focus on clinically significant impairment in important areas of functioning, while recognising that autistic people have very different strengths, abilities, and support needs.

---

One of the most important things your book can teach

You could have an Easy Read box like this:

What Happened to Asperger's Syndrome?

Asperger's syndrome was once used as a separate diagnosis.

It described people who had autistic characteristics but generally did not have significant early language or intellectual difficulties.

In 2013, the DSM-5 changed the way autism was classified.

Asperger's disorder was no longer a separate diagnosis.

It became part of:

Autism Spectrum Disorder (ASD)

This happened because research found that it was difficult to clearly separate Asperger's disorder from other forms of autism.

Does this mean Asperger's was not real?

No.

People who received an Asperger's diagnosis had real experiences and real support needs.

The change was about how professionals classify autism, not about saying that those people's experiences were not real.

Why is autism called a spectrum?

Autistic people can have very different:

• Strengths

• Difficulties

• Communication styles

• Sensory experiences

• Interests

• Support needs

• Levels of independence

There is no single way to be autistic.

What About People Who Were Diagnosed Before 2013?

Their previous diagnosis is part of their history.

Some people still use the word Asperger's because it is the diagnosis they received or because they identify with the term.

Other people prefer:

• Autistic person

• Autistic

• Person with autism

• Autism spectrum disorder

People have different preferences about language.

Key Message

The diagnostic name changed. The person's experiences did not.

Asperger's disorder is no longer a separate DSM-5-TR diagnosis, but people who were previously diagnosed with Asperger's did not suddenly stop being who they were.