Substance Use and Co-Occurring Mental Disorders

Last updated: February 8, 2026Reviewed date: February 8, 2026Reading time: 6 min read
Patient Tools

Read, save, and share this guide

Use these quick tools to make this medical article easier to read, print, save, or share with a family member.

Patient Mode

Understand this article easily

Switch between simple English and easy Bangla patient notes. This is for education and does not replace a doctor consultation.

Substance use disorders and co-occurring mental disorders are complex conditions that can significantly impact an individual's life. This guide aims to provide a clear and concise overview of these disorders, including their types, causes, symptoms, diagnostic tests, treatments, drugs, surgeries, preventions, and when to seek...

For severe symptoms, danger signs, pregnancy, child illness, or sudden worsening, seek urgent medical care.

বাংলা রোগী নোট এখনো যোগ করা হয়নি। পোস্ট এডিটরে “RX Bangla Patient Mode” বক্স থেকে সহজ বাংলা সারাংশ যোগ করুন।

এই তথ্য শিক্ষা ও সচেতনতার জন্য। এটি ডাক্তারি পরীক্ষা, রোগ নির্ণয় বা প্রেসক্রিপশনের বিকল্প নয়।

Article Summary

Substance use disorders and co-occurring mental disorders are complex conditions that can significantly impact an individual's life. This guide aims to provide a clear and concise overview of these disorders, including their types, causes, symptoms, diagnostic tests, treatments, drugs, surgeries, preventions, and when to seek medical help. Substance use disorders refer to the problematic use of substances such as alcohol, drugs, or medications, leading to...

Key Takeaways

  • This article explains Causes: in simple medical language.
  • This article explains Symptoms: in simple medical language.
  • This article explains Diagnostic Tests in simple medical language.
  • This article explains Treatments in simple medical language.
Educational health guideWritten for patient understanding and clinical awareness.
Reviewed content workflowUse writer and reviewer profiles for stronger trust.
Emergency safety firstUrgent warning signs are highlighted below.
Choose your reading view

Patient View highlights a simple learning journey. Clinical View reveals structure, evidence, and editorial completeness.

Seek urgent medical care if you notice

These warning signs are general safety guidance. Local emergency numbers and clinical judgment should always come first.

  • Severe symptoms, breathing difficulty, fainting, confusion, or rapidly worsening illness.
  • New weakness, severe pain, high fever, or symptoms after a serious injury.
  • Any symptom that feels urgent, unusual, or unsafe for the patient.
1

Emergency now

Use emergency care for severe, sudden, rapidly worsening, or life-threatening symptoms.

2

See a doctor

Book a professional medical evaluation if symptoms persist, worsen, recur often, affect daily activities, or occur in a high-risk patient.

3

Learn safely

Use this article to understand possible causes, tests, treatment options, prevention, and questions to ask your clinician.

Before reading

RX Patient Tools

Use these quick guides before reading the article, or return to them when you need help preparing questions for a doctor.

Start here Choose the right pathway for symptoms, reports, medicines, or urgent warning signs. Disease article roadmap Read this topic step by step: meaning, symptoms, warning signs, diagnosis, treatment, prevention, and follow-up. Treatment planner Prepare questions about treatment choices, benefits, risks, side effects, and follow-up. Family & caregiver guide Organize symptoms, reports, medicines, questions, and follow-up safely. Nutrition & diet guide Prepare food, hydration, supplement, and medicine-timing questions safely. Prevention guide Organize risk factors, protective habits, screening, and warning signs. Recovery guide Prepare a safe plan for activity, rehabilitation, warning signs, and follow-up.
Definition

Substance use disorders and co-occurring mental disorders are complex conditions that can significantly impact an individual’s life. This guide aims to provide a clear and concise overview of these disorders, including their types, causes, symptoms, diagnostic tests, treatments, drugs, surgeries, preventions, and when to seek medical help.

Substance use disorders refer to the problematic use of substances such as alcohol, drugs, or medications, leading to significant impairment or distress. Co-occurring mental disorders, also known as dual diagnosis or comorbid disorders, occur when substance use disorders coincide with mental health conditions such as depression, anxiety, or bipolar disorder.

Types:

  1. Alcohol use disorder
  2. Substance-induced mood disorders
  3. Substance-induced anxiety disorders
  4. Substance-induced psychotic disorders
  5. Substance-induced sleep disorders
  6. Alcohol Use Disorder (AUD)
  7. Opioid Use Disorder (OUD)
  8. Cocaine Use Disorder
  9. Cannabis Use Disorder
  10. Stimulant Use Disorder
  11. Sedative, Hypnotic, or Anxiolytic Use Disorder
  12. Hallucinogen Use Disorder
  13. Inhalant Use Disorder
  14. Tobacco Use Disorder
  15. Polysubstance Use Disorder

Causes:

  1. Genetic predisposition
  2. Environmental factors (e.g., peer pressure, trauma)
  3. Mental health conditions (e.g., depression, anxiety)
  4. Early exposure to substances
  5. Social and cultural influences
  6. Lack of coping skills
  7. Stressful life events
  8. Co-occurring medical conditions
  9. Prescription drug misuse
  10. Family history of substance use disorders
  11. Poor parental supervision
  12. Low self-esteem
  13. Availability of drugs or alcohol
  14. Co-occurring trauma or abuse
  15. Neurological factors
  16. Behavioral conditioning
  17. Lack of access to mental health resources
  18. Economic factors
  19. Peer influence
  20. Self-medication for mental health symptoms

Symptoms:

  1. Cravings for the substance
  2. Increased tolerance
  3. Withdrawal symptoms
  4. Continued use despite negative consequences
  5. Loss of interest in previously enjoyed activities
  6. Neglecting responsibilities
  7. Changes in mood or behavior
  8. Secretive behavior
  9. Financial problems
  10. Legal issues related to substance use
  11. Relationship difficulties
  12. Poor hygiene
  13. Physical health problems
  14. Changes in appetite or weight
  15. Insomnia or changes in sleep patterns
  16. Impaired coordination
  17. Memory problems
  18. Hallucinations or delusions
  19. Paranoia
  20. Suicidal thoughts or behaviors

Diagnostic Tests

(History, Physical Examination):

  1. Medical history interview
  2. Mental health assessment
  3. Substance use screening questionnaires
  4. Physical examination
  5. Blood tests for substance levels
  6. Urine drug screening
  7. Breathalyzer test for alcohol
  8. Psychological evaluations
  9. Assessment of withdrawal symptoms
  10. Evaluation of co-occurring medical conditions
  11. Review of medications
  12. Assessment of social support systems
  13. Evaluation of family history of substance use or mental health disorders
  14. Neurological examinations
  15. Assessments of cognitive functioning
  16. Review of past treatments or interventions
  17. Screening for trauma or abuse history
  18. Assessment of current stressors
  19. Evaluation of psychiatric symptoms
  20. Collaboration with family members or close contacts for additional information

Treatments

(Non-Pharmacological):

  1. Individual therapy (e.g., cognitive-behavioral therapy)
  2. Group therapy or support groups
  3. Family therapy
  4. Motivational interviewing
  5. Behavioral interventions
  6. Psychoeducation about substance use and mental health
  7. Relapse prevention techniques
  8. Stress management techniques (e.g., mindfulness, relaxation exercises)
  9. Healthy lifestyle changes (e.g., exercise, nutrition)
  10. Dual diagnosis treatment programs
  11. Twelve-step programs (e.g., Alcoholics Anonymous, Narcotics Anonymous)
  12. Dialectical behavior therapy (DBT)
  13. Trauma-informed therapy
  14. Art therapy or expressive therapies
  15. Yoga or meditation
  16. Life skills training
  17. Vocational rehabilitation
  18. Assertive community treatment (ACT)
  19. Peer support services
  20. Holistic approaches such as acupuncture or massage therapy

Drugs:

  1. Alcohol
  2. Cannabis
  3. Heroin
  4. Cocaine
  5. Methamphetamine
  6. Prescription opioids (e.g., oxycodone, hydrocodone)
  7. Benzodiazepines (e.g., Xanax, Valium)
  8. Synthetic cannabinoids (e.g., Spice, K2)
  9. MDMA (Ecstasy)
  10. LSD
  11. Psilocybin (Magic mushrooms)
  12. Ketamine
  13. Inhalants (e.g., solvents, aerosols)
  14. Tobacco
  15. Synthetic cathinones (e.g., bath salts)
  16. Prescription stimulants (e.g., Adderall, Ritalin)
  17. Synthetic opioids (e.g., fentanyl)
  18. Club drugs (e.g., GHB, Rohypnol)
  19. Anabolic steroids
  20. Caffeine

Surgeries:

  1. Surgical interventions are not typically used to treat substance use disorders. However, in cases where there are complications due to substance use, surgeries may be required to address related health issues, such as liver damage from alcohol abuse or infections from injection drug use.

Preventions:

  1. Education about the risks of substance use
  2. Building strong coping skills
  3. Developing healthy peer relationships
  4. Addressing underlying mental health concerns
  5. Creating supportive environments
  6. Limiting access to substances
  7. Encouraging healthy lifestyle habits
  8. Teaching effective stress management techniques
  9. Providing access to mental health resources
  10. Early intervention and treatment for substance use and mental health concerns

When to See Doctors:

  1. If you’re struggling to control your substance use despite efforts to cut down or stop
  2. If substance use is causing problems in your relationships, work, or daily life
  3. If you’re experiencing withdrawal symptoms when you try to stop using substances
  4. If you’re using substances to cope with emotional or mental health issues
  5. If you’re experiencing symptoms of a mental health condition alongside substance use
  6. If you’re concerned about your substance use or its impact on your health
  7. If you’re noticing physical health problems related to substance use
  8. If you’re experiencing suicidal thoughts or behaviors
  9. If you’re facing legal issues related to substance use
  10. If you’re unsure whether your substance use is becoming a problem and want guidance or support.

 

Disclaimer: Each person’s journey is unique, treatment plan, life style, food habit, hormonal condition, immune system, chronic disease condition, geological location, weather and previous medical  history is also unique. So always seek the best advice from a qualified medical professional or health care provider before trying any treatments to ensure to find out the best plan for you. This guide is for general information and educational purposes only. If you or someone are suffering from this disease condition bookmark this website or share with someone who might find it useful! Boost your knowledge and stay ahead in your health journey. Thank you for giving your valuable time to read the article.

  1. https://www.ncbi.nlm.nih.gov/books/NBK532297/
  2. https://www.ncbi.nlm.nih.gov/books/NBK549894/
  3. https://www.ncbi.nlm.nih.gov/books/NBK526002/
  4. https://www.ncbi.nlm.nih.gov/books/NBK538474/
  5. https://www.ncbi.nlm.nih.gov/books/NBK53086/
  6. https://www.ncbi.nlm.nih.gov/books/NBK470237/
  7. https://www.ncbi.nlm.nih.gov/books/NBK576402/
  8. https://www.ncbi.nlm.nih.gov/books/NBK525964/
  9. https://www.ncbi.nlm.nih.gov/books/NBK441963/
  10. https://medlineplus.gov/skinconditions.html
  11. https://www.aad.org/about/burden-of-skin-disease
  12. https://www.usa.gov/federal-agencies/national-institute-of-arthritis-musculoskeletal-and-skin-diseases
  13. https://www.cdc.gov/niosh/topics/skin/default.html
  14. https://www.skincancer.org/
  15. https://illnesshacker.com/
  16. https://endinglines.com/
  17. https://www.jaad.org/
  18. https://www.psoriasis.org/about-psoriasis/
  19. https://books.google.com/books?
  20. https://www.niams.nih.gov/health-topics/skin-diseases
  21. https://cms.centerwatch.com/directories/1067-fda-approved-drugs/topic/292-skin-infections-disorders
  22. https://www.fda.gov/files/drugs/published/Acute-Bacterial-Skin-and-Skin-Structure-Infections—Developing-Drugs-for-Treatment.pdf
  23. https://dermnetnz.org/topics
  24. https://www.aaaai.org/conditions-treatments/allergies/skin-allergy
  25. https://www.sciencedirect.com/topics/medicine-and-dentistry/occupational-skin-disease
  26. https://aafa.org/allergies/allergy-symptoms/skin-allergies/
  27. https://www.nibib.nih.gov/
  28. https://rxharun.com/resources/category/resources/rxharun/article-types/skin-care-beauty/skin-diseases-types-symptoms-treatment/
  29. https://www.nei.nih.gov/
  30. https://en.wikipedia.org/wiki/List_of_skin_conditions
  31. https://en.wikipedia.org/?title=List_of_skin_diseases&redirect=no
  32. https://en.wikipedia.org/wiki/Skin_condition
  33. https://oxfordtreatment.com/
  34. https://www.nidcd.nih.gov/health/
  35. https://consumer.ftc.gov/articles/w
  36. https://www.nccih.nih.gov/health
  37. https://catalog.ninds.nih.gov/
  38. https://www.aarda.org/diseaselist/
  39. https://www.ninds.nih.gov/Disorders/Patient-Caregiver-Education/Fact-Sheets
  40. https://www.nibib.nih.gov/
  41. https://www.nia.nih.gov/health/topics
  42. https://www.nichd.nih.gov/
  43. https://www.nimh.nih.gov/health/topics
  44. https://www.nichd.nih.gov/
  45. https://www.niehs.nih.gov
  46. https://www.nimhd.nih.gov/
  47. https://www.nhlbi.nih.gov/health-topics
  48. https://obssr.od.nih.gov/
  49. https://www.nichd.nih.gov/health/topics
  50. https://rarediseases.info.nih.gov/diseases
  51. https://beta.rarediseases.info.nih.gov/diseases
  52. https://orwh.od.nih.gov/

 

RX Medical Knowledge Graph

Explore this medical topic

Continue through verified related conditions, investigations, medicines, and patient guides. These links are educational and do not replace professional medical advice.

Related medical topics

Benzodiazepine Addiction Treatment68% relationship confidence Cocaine Addiction Treatment68% relationship confidence Fentanyl Addiction Treatment68% relationship confidence Heroin Addiction Treatment68% relationship confidence Marijuana Addiction68% relationship confidence Meth Addiction Treatment68% relationship confidence Rehabilitation Center for Alcohol68% relationship confidence Sleeping Pill Addiction68% relationship confidence
RX Clinical Pathway Engine

Continue through a complete learning pathway

Move from understanding the topic to symptoms, tests, treatment, medicines, monitoring, and prevention.

Search the complete library
  1. Understand the condition Begin with the essential facts and a clear explanation of the topic.
  2. Recognize symptoms Learn common symptoms, signs, and patterns of presentation.
  3. Know when to seek help Review urgent warning signs and when professional assessment may be needed.
  4. Understand causes and risks Explore causes, risk factors, mechanisms, and contributing conditions.
  5. Explore tests and diagnosis Learn how clinicians assess the condition and which investigations may be discussed.
  6. Learn treatment approaches Review general treatment categories and management principles.
  7. Understand medicines safely Continue to medicine education, uses, precautions, and monitoring.
  8. Plan monitoring and follow-up Understand monitoring, complications, rehabilitation, and follow-up learning.
  9. Review prevention and self-care Explore prevention, healthy routines, and questions to discuss with a clinician.

Conditions & Diseases

Background, symptoms, causes, diagnosis, and care.

Explore this library

Tests & Investigations

Laboratory, imaging, screening, and diagnostic education.

Explore this library

Medicines

Uses, safety, monitoring, and related medicine knowledge.

Explore this library

Cancer Knowledge

Cancer types, screening, oncology, and treatment education.

Explore this library
Doctor visit helper

Prepare before seeing a doctor

A simple rural-patient checklist to help you explain symptoms clearly, ask better questions, and avoid unsafe self-treatment.

Safety note: This is not a prescription or diagnosis. For severe symptoms, pregnancy danger signs, children with serious illness, chest pain, breathing difficulty, stroke-like weakness, or major injury, seek urgent care.

Which doctor may help?

Start with a registered doctor or the nearest qualified health center.

What to tell the doctor

  • Write when the problem started and how it changed.
  • Bring old prescriptions, investigation reports, and current medicines.
  • Write allergies, pregnancy status, diabetes, kidney/liver disease, and major past illnesses.
  • Bring one family member if the patient is weak, elderly, confused, or a child.

Questions to ask

  • What is the most likely cause of my symptoms?
  • Which danger signs mean I should go to hospital quickly?
  • Which tests are necessary now, and which can wait?
  • How should I take medicines safely and what side effects should I watch for?
  • When should I come for follow-up?

Tests to discuss

  • Vital signs: temperature, pulse, blood pressure, oxygen saturation
  • Basic physical examination by a clinician
  • CBC, urine test, blood sugar, or imaging only when clinically needed

Avoid these mistakes

  • Do not use antibiotics, steroid tablets/injections, or strong painkillers without proper medical advice.
  • Do not hide pregnancy, kidney disease, ulcer, allergy, or blood thinner use.
  • Do not delay emergency care when danger signs are present.

Medicine safety and first-aid guide

This section is for patient education only. It does not replace a doctor, pharmacist, or emergency care.

Safe first steps

  • Avoid heavy lifting, sudden bending, and prolonged bed rest.
  • Use comfortable posture and gentle movement as tolerated.
  • Discuss physiotherapy, X-ray, or MRI only when clinically needed.

OTC medicine safety

  • For mild back pain, pain-relief medicine may be discussed with a doctor or pharmacist.
  • Avoid repeated painkiller use if you have kidney disease, stomach ulcer, uncontrolled blood pressure, or are taking blood thinners.

Avoid these mistakes

  • Do not start antibiotics without a proper medical decision.
  • Do not use steroid tablets or injections casually for quick relief.
  • Do not delay emergency care because of home remedies.

Get urgent help if

  • Back pain with leg weakness, numbness around private area, loss of urine/stool control, fever, cancer history, or major injury needs urgent care.
Medicine names, dose, and timing must be decided by a qualified clinician or pharmacist after checking age, pregnancy, allergy, other diseases, and current medicines.

For rural patients and family caregivers

Patient health record and symptom diary

Write your symptoms, medicines already taken, test results, and questions before visiting a doctor. This note stays on your device unless you print or copy it.

Doctor to discuss: Doctor / qualified healthcare provider
Tests to discuss with doctor
  • Basic vital signs: temperature, pulse, blood pressure, oxygen level if needed
  • Relevant blood, urine, imaging, or specialist tests only after clinical assessment
Questions to ask
  • What is the most likely cause of my symptoms?
  • Which warning signs mean I should go to emergency care?
  • Which tests are really needed now?
  • Which medicines are safe for my age, pregnancy status, allergy, kidney/liver/stomach condition, and current medicines?

Emergency warning signs such as chest pain, severe breathing difficulty, sudden weakness, confusion, severe dehydration, major injury, or loss of bladder/bowel control need urgent medical care. Do not wait for online information.

Safe pathway to proper treatment

Care roadmap for: Substance Use and Co-Occurring Mental Disorders

Use this simple roadmap to understand the next safe steps. It is educational and does not replace examination by a doctor.

Go to emergency care if you notice:
  • Severe or rapidly worsening symptoms
  • Breathing difficulty, chest pain, fainting, confusion, severe weakness, major injury, or severe dehydration
Doctor / service to discuss: Qualified healthcare provider; specialist depends on symptoms and examination.
  1. Step 1

    Check danger signs first

    If danger signs are present, seek emergency care and do not wait for online information.

  2. Step 2

    Record the symptom story

    Write when symptoms started, severity, medicines already taken, allergies, pregnancy status, and test results.

  3. Step 3

    Visit a qualified clinician

    A doctor, nurse, or qualified healthcare provider can examine you and decide which tests or treatment are needed.

  4. Step 4

    Do only useful tests

    Do tests after clinical assessment. Avoid unnecessary tests, random antibiotics, or repeated medicines without diagnosis.

  5. Step 5

    Follow up and return early if worse

    If symptoms worsen, new warning signs appear, or treatment is not helping, return for review quickly.

Rural patient practical tips
  • Take a written symptom diary and all previous prescriptions/test reports.
  • Do not hide medicines already taken, even herbal or over-the-counter medicines.
  • Ask which warning signs mean urgent referral to hospital.

This roadmap is for education. A real diagnosis and treatment plan requires history, examination, and clinical judgment.

RX Patient Help

Ask a health question safely

Write your symptom story. A health professional or site editor can review it before any answer is prepared. This box is not for emergency care.

Emergency first: Severe chest pain, breathing trouble, unconsciousness, stroke signs, severe injury, heavy bleeding, or rapidly worsening symptoms need urgent local medical care now.

Frequently Asked Questions

Is this article a replacement for a doctor?

No. It is educational content only. Patients should consult a qualified clinician for diagnosis and treatment.

When should I seek urgent care?

Seek urgent care for severe symptoms, rapidly worsening condition, breathing difficulty, severe pain, neurological changes, or any emergency warning sign.

Continue exploring

Explore this topic across the RX Medical Library

Open a focused A–Z pathway or continue with closely related indexed articles. These links are educational and do not replace personal medical care.

Search this topic
Diseases A–Z Drugs A–Z Lab Tests A–Z Cancer A–Z
Diseases A–Z

10 Best Mindfulness Podcasts

Recently, there has been a growing focus on the benefits of mindfulness. Are you curious about…

More from this topic
  1. Oligophrenia

    DefinitionOligophrenia is an old medical word that means a long-lasting problem with learning, thinking, and daily life skills that starts in childhood. Today doctors almost never...

    February 1, 2026 • Rx Psychotherapy, Drug Addiction and Rehabilitation
  2. Very Early-Onset Schizophrenia (VEOS)

    DefinitionVery early-onset schizophrenia (VEOS) is a serious brain illness. In this condition, a child has strong problems with thinking, feelings, and behavior. The child may see...

    January 9, 2026 • Rx Psychotherapy, Drug Addiction and Rehabilitation
  3. Childhood-Onset Schizophrenia

    DefinitionChildhood-onset schizophrenia is a serious mental health disorder where a child loses touch with reality. This means the child may see, hear, or believe things that...

    January 9, 2026 • Rx Psychotherapy, Drug Addiction and Rehabilitation
  4. Symbiotic Psychosis

    DefinitionSymbiotic psychosis is a rare mental health problem where two or more people who are very close to each other share the same strange belief (delusion)....

    January 8, 2026 • Rx Psychotherapy, Drug Addiction and Rehabilitation
  5. Disintegrative Psychosis

    DefinitionDisintegrative psychosis is an old name for a very rare child development problem now called childhood disintegrative disorder (CDD). In this condition, a child grows and...

    January 8, 2026 • Rx Psychotherapy, Drug Addiction and Rehabilitation
  6. Childhood Disintegrative Disorder (CDD)

    DefinitionChildhood disintegrative disorder (CDD) is a very rare brain and development problem in children. A child grows and learns normally for at least the first 2–3...

    January 7, 2026 • Rx Psychotherapy, Drug Addiction and Rehabilitation
  7. Pedophilia

    DefinitionPedophilia is a mental health condition in which a person has recurrent, intense sexual thoughts, urges, or fantasies about prepubescent children (children who have not started...

    October 10, 2025 • Rx Psychotherapy, Drug Addiction and Rehabilitation
  8. Emotional Dysexecutive Syndrome

    DefinitionEmotional Dysexecutive Syndrome is a condition in which damage to executive brain networks—especially in the frontal lobes—impairs a person’s ability to regulate emotions. Individuals may find...

    June 26, 2025 • Rx Psychotherapy, Drug Addiction and Rehabilitation
  9. Behavioural Dysexecutive Syndrome (BDS)

    DefinitionBehavioural Dysexecutive Syndrome (BDS) is a pattern of problems that arise when the brain’s “executive” control system becomes impaired. Executive functions include planning, decision-making, impulse control,...

    June 26, 2025 • Rx Psychotherapy, Drug Addiction and Rehabilitation
  10. Cognitive Dysexecutive Syndrome

    DefinitionCognitive Dysexecutive Syndrome is a pattern of thinking and behavior problems resulting from damage to the brain’s executive control systems. These systems—often associated with the frontal...

    June 26, 2025 • Rx Psychotherapy, Drug Addiction and Rehabilitation