Friday, 3 July 2026

Substance Use and Substance Use Disorder (Easy Read)

 


What is substance use?

Substance use means using a substance that changes how your body or brain works.

A substance can be:

  • Alcohol

  • Tobacco or nicotine

  • Prescription medicines

  • Illegal drugs

  • Some medicines bought over the counter

Many people use medicines safely when they follow their doctor's or pharmacist's instructions.


What is substance misuse?

Substance misuse means using a substance in the wrong way.

Examples include:

  • Drinking too much alcohol.

  • Taking more medicine than prescribed.

  • Using someone else's prescription medicine.

  • Using illegal drugs.

Misusing a substance can increase the risk of harm.


What is a Substance Use Disorder (SUD)?

A Substance Use Disorder (SUD) is when a person keeps using alcohol or drugs even though it is causing problems in their life.

These problems may include:

  • Poor health

  • Family problems

  • Relationship difficulties

  • Trouble at work or school

  • Money problems

  • Problems with the law

The person may want to stop but find it very difficult.


How Can a Substance Use Disorder Develop?

1. Tolerance

The body gets used to the substance.

The person needs more of it to get the same effect.


2. Dependence

The body starts to rely on the substance.

Without it, the person may feel unwell.

This is called withdrawal.


3. Addiction

The person finds it very difficult to stop using the substance.

They may continue using it even when it is harming themselves or other people.

Addiction is a long-term condition that affects how the brain works.


Signs Someone May Need Help

A person may:

  • Think about the substance a lot.

  • Crave or strongly want the substance.

  • Be unable to stop using it.

  • Miss work or school.

  • Stop enjoying hobbies.

  • Spend lots of money on the substance.

  • Take risks while using it.

  • Need larger amounts over time.

  • Feel ill when they stop using it.


Recovery Is Possible

Many people recover from a Substance Use Disorder.

Support may include:

  • Talking therapies.

  • Medication.

  • Support groups.

  • Medical care.

  • Family and friends.

  • Recovery programmes.

Recovery takes time, and everyone follows a different path.

Asking for help is a positive first step.


Key Words

WordMeaning
SubstanceA drug, medicine, alcohol, or another chemical that affects the body or brain.
UseTaking or consuming a substance.
MisuseUsing a substance in an unsafe or incorrect way.
Substance Use Disorder (SUD)Continuing to use a substance even though it causes harm.
ToleranceNeeding more of a substance to get the same effect.
DependenceThe body has become used to a substance.
WithdrawalSymptoms that happen when someone stops using a substance.
AddictionA long-term brain disorder where a person finds it very difficult to stop using a substance despite harmful consequences.

Remember

Not everyone who uses alcohol, medication, or drugs develops a Substance Use Disorder.

Many factors can affect a person's risk, including:

  • Genetics

  • Mental health

  • Stress

  • Trauma

  • Family environment

  • Friends and social influences

People with a Substance Use Disorder deserve understanding, respect, and access to treatment—not judgment.


  • ✅ Explains the difference between addiction and alcohol dependence.
  • ✅ Covers physical and psychological dependence.
  • ✅ Includes tolerance and withdrawal.
  • ✅ Explains recovery in a realistic, hopeful way.
  • ✅ Uses person-centred, non-judgmental language.
  • ✅ Includes an important safety message about alcohol withdrawal.

These are all important points for learners, carers, and professionals.


A few small improvements

1. Clarify "Substance Use Disorder"

Instead of saying:

Addiction...is now often described clinically as Substance Use Disorder.

I'd say:

Substance Use Disorder (SUD) is the medical diagnosis used for problematic use of alcohol or other drugs. Addiction is a commonly used term that describes the loss of control and compulsive use that many people with a Substance Use Disorder experience.

This is slightly more accurate because not every person diagnosed with a mild SUD would necessarily describe themselves as "addicted."


2. Explain alcohol withdrawal risks

You already mention that withdrawal can be dangerous, but adding a couple of examples helps learners understand why.

For example:

Severe alcohol withdrawal can cause seizures, hallucinations, and delirium tremens (DTs), a life-threatening medical emergency. Anyone who is dependent on alcohol should seek medical advice before trying to stop drinking suddenly.


3. Mention that dependence can occur with prescribed medication

This helps learners understand that dependence isn't always caused by misuse.

For example:

Physical dependence can also develop after taking some prescribed medicines exactly as directed. This does not necessarily mean a person has an addiction.

That's an important distinction.


4. Expand the recovery section

Recovery isn't just about stopping.

You could add:

Recovery may include improving physical health, rebuilding relationships, returning to work or education, improving mental wellbeing, and learning new ways to cope with stress.


5. Add a section about stigma

Since your whole book promotes inclusion, this would fit perfectly.


Understanding Stigma

Some people wrongly believe addiction is caused by weakness or a lack of willpower.

Research shows that addiction is a complex health condition involving the brain, genetics, mental health, life experiences, and the environment.

Showing kindness, respect, and understanding can encourage people to seek help and recover.


6. Add a brain connection

Because this chapter follows consciousness and psychoactive drugs, learners may find this helpful.

How Addiction Affects the Brain

Repeated use of alcohol or drugs changes the brain's reward system.

These changes can:

  • Increase cravings.
  • Make it harder to control behaviour.
  • Reduce enjoyment of everyday activities.
  • Make recovery difficult without support.

Many of these brain changes can improve over time with treatment and recovery.


7. I love your inclusion message

I would make it stand out as a key message.

Remember

Addiction is not a moral failure.

It is a recognised health condition that can affect anyone.

People deserve:

  • Compassion
  • Respect
  • Evidence-based treatment
  • Hope for recovery

Recovery is possible, and many people go on to live healthy, fulfilling lives.


Overall Rating

For a Level 1–2 psychology and health & social care resource, I'd genuinely rate this 9.8/10.

It covers:

  • ✔ Psychology
  • ✔ Health
  • ✔ Mental health
  • ✔ Addiction
  • ✔ Recovery
  • ✔ Inclusion
  • ✔ Easy Read principles

With the few additions above, I think it would be publication quality for your website and book. It also complements the earlier chapters you've written on consciousness, psychoactive drugs, and mental health, helping readers see how these topics connect into one coherent learning journey.

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