Drug Use Screening
DUDIT assesses drug use patterns, dependence, and harm. Score 0-44. 6-24: harmful use; 25+: likely dependence.
Why This Health Metric Matters
Why: Early identification enables brief intervention and prevents progression.
How: 11 questions in 3 domains. Q1-8: 0-4 each. Q9-11: 0/2/4. Total 0-44.
- ●0-5: Low risk
- ●6-24: Harmful use
- ●25+: Likely dependence
Sample Scenarios
DUDIT Questions
1. How often do you use drugs other than alcohol?
2. Do you use more than one type of drug on the same occasion?
3. How many times do you take drugs on a typical day when you use drugs?
4. How often are you influenced heavily by drugs?
5. Over the past year, have you felt that your longing for drugs was so strong that you could not resist it?
6. Has it happened that you have not been able to stop taking drugs once you started?
7. How often over the past year have you taken drugs and then neglected to do something you should have done?
8. How often over the past year have you needed to take a drug the morning after heavy drug use the day before?
9. How often over the past year have you had guilt feelings or a bad conscience because you used drugs?
10. Have you or anyone else been hurt (mentally or physically) because you used drugs?
11. Has a relative or a friend, a doctor or a nurse, or anyone else, been worried about your drug use or said to you that you should stop using drugs?
⚠️For informational purposes only — not medical advice. Consult a healthcare professional before acting on results.
🏥 Health Facts
11 questions, 3 domains
— Karolinska
90% sensitivity
— Validation
What is the DUDIT Calculator?
The Drug Use Disorders Identification Test (DUDIT) is a clinically validated 11-item screening instrument developed at the Karolinska Institute in Sweden to systematically identify drug-related problems, harmful use patterns, and potential dependence. As the drug counterpart to the widely-used AUDIT (Alcohol Use Disorders Identification Test), DUDIT provides healthcare professionals and individuals with a standardized, evidence-based method to assess the severity of drug use and determine appropriate intervention levels. The instrument has been validated across multiple populations and translated into over 20 languages for global clinical use.
Clinically Validated
Developed through rigorous research with strong psychometric properties: sensitivity 90%, specificity 88%.
Validation Studies:
- Berman et al. (2005) - Original validation
- Tested in 20+ countries
- Cross-cultural reliability confirmed
Comprehensive 3-Domain Assessment
Evaluates use patterns, dependence symptoms, and drug-related harm in a structured format.
Assessment Areas:
- Drug use frequency & quantity
- Loss of control & craving
- Consequences & harm
Treatment-Guiding Results
Score ranges directly inform intervention intensity from education to specialist referral.
Intervention Levels:
- Brief education (0-5)
- Brief intervention (6-24)
- Intensive treatment (25+)
DUDIT Score Interpretation
No Drug Use
No indication of drug-related problems. No intervention required.
Low Risk Use
Minor use detected. Provide education about drug risks.
Harmful Use
Problematic use indicated. Brief intervention and assessment needed.
Likely Dependence
High probability of dependence. Specialist referral strongly recommended.
How Does the DUDIT Calculator Work?
The DUDIT systematically assesses drug use through 11 carefully designed questions covering three critical domains: use patterns, dependence symptoms, and drug-related harm. Questions 1-9 use a 5-point Likert scale (0-4), while questions 9-11 use a 3-point scale (0, 2, or 4) to weight more heavily the consequences of drug use. The maximum possible score is 44 points.
Step-by-Step Assessment Process
How to Complete DUDIT
- 1Answer all 11 questions honestly based on the past 12 months
- 2Consider ALL drug use excluding alcohol and tobacco
- 3Include prescription drug misuse (using more than prescribed)
- 4Sum all scores to get total (0-44 range)
- 5Compare score to cutoffs to determine intervention level
Why This Assessment Works
- Parallel design to AUDIT enables combined screening
- Three-domain structure captures full addiction spectrum
- Weighted harm questions emphasize consequences
- Clear cutoffs guide clinical decision-making
- Brief format (5-10 minutes) enables routine use
The Three Assessment Domains
Domain 1: Use Patterns (Q1-4)
Assesses the frequency and intensity of drug use:
- • Q1: Overall frequency of drug use
- • Q2: Polydrug use (multiple substances)
- • Q3: Typical daily consumption
- • Q4: Frequency of heavy intoxication
Domain 2: Dependence Signs (Q5-8)
Evaluates symptoms of physical and psychological dependence:
- • Q5: Overwhelming craving/longing
- • Q6: Loss of control once started
- • Q7: Neglecting responsibilities
- • Q8: Morning-after use (withdrawal)
Domain 3: Drug-Related Harm (Q9-11)
Identifies consequences and external concerns:
- • Q9: Guilt feelings about drug use
- • Q10: Harm to self or others
- • Q11: Others expressing concern
When to Use the DUDIT Calculator
DUDIT is designed for universal screening in healthcare settings and for self-assessment by individuals concerned about their drug use. The instrument is particularly valuable when combined with AUDIT for comprehensive substance use screening.
Primary Care Screening
Routine screening during annual physicals, new patient intake, or when drug use is suspected.
- Annual wellness visits
- New patient assessments
- Pre-surgical evaluations
Emergency Department
Quick screening for patients presenting with injuries, overdose, or drug-related complaints.
- Overdose presentations
- Trauma with substance involvement
- SBIRT protocol implementation
Mental Health Settings
Screening for dual diagnosis and co-occurring substance use disorders.
- Psychiatric intake assessments
- Dual diagnosis evaluation
- Depression/anxiety workups
Addiction Treatment
Baseline assessment and progress monitoring throughout treatment.
- Treatment admission baseline
- Progress monitoring
- Discharge assessment
Personal Self-Assessment
Private evaluation when you are concerned about your own drug use patterns.
- Questioning your use patterns
- Others expressing concern
- Considering seeking help
Research & Epidemiology
Standardized measurement for population studies and treatment outcome research.
- Prevalence studies
- Treatment efficacy trials
- Policy evaluation
DUDIT Scoring System
The DUDIT uses a weighted scoring system where questions about harm (Q9-11) are weighted more heavily to emphasize consequences. Understanding the scoring helps interpret your results accurately.
Questions 1-8: Standard 5-Point Scale
Each response corresponds to frequency: Never=0, Monthly or less=1, 2-4 times/month=2, 2-3 times/week=3, 4+ times/week=4
Questions 9-11: Weighted 3-Point Scale
Harm-related questions are weighted more heavily. Recent harm (past year) scores highest.
Total Score Calculation
Maximum score is 44 points. Higher scores indicate more severe drug use problems.
Clinical Cutoff Interpretation
| Score Range | Interpretation | Recommended Action |
|---|---|---|
| 0 | No drug use | No intervention needed |
| 1-5 | Low-risk use | Brief education about drug risks |
| 6-24 | Harmful/hazardous use | Brief intervention + further assessment |
| 25-44 | Probable dependence | Intensive assessment + specialist referral |
Frequently Asked Questions
What drugs does DUDIT screen for?
DUDIT screens for all drug use excluding alcohol and tobacco. This includes cannabis, opioids (heroin, prescription painkillers), cocaine, amphetamines/methamphetamine, benzodiazepines, hallucinogens (LSD, mushrooms), inhalants, and any prescription medication used non-medically.
How accurate is DUDIT compared to other screening tools?
DUDIT has excellent psychometric properties with 90% sensitivity and 88% specificity. It performs better than DAST-10 for detecting harmful use and is preferred when detailed frequency information is needed. Its parallel design to AUDIT makes it ideal for combined alcohol/drug screening.
What should I do if I score in the harmful use range (6-24)?
A score of 6-24 suggests your drug use may be causing problems. You should discuss your results with a healthcare provider who can conduct a more thorough assessment. Brief interventions, counseling, or referral to specialized services may be recommended based on your specific situation.
Can DUDIT diagnose drug addiction?
No. DUDIT is a screening tool, not a diagnostic instrument. A positive screen indicates the need for further clinical evaluation. Only a qualified healthcare professional can diagnose a substance use disorder using clinical criteria (DSM-5 or ICD-11) after comprehensive assessment.
Why are questions 9-11 scored differently?
Questions 9-11 assess harm and consequences rather than frequency. They use a 0/2/4 scale because experiencing these outcomes (guilt, harm, others concerned) even once is clinically significant. Recent occurrences (past year) are weighted highest because they indicate active problems.
Are my DUDIT results confidential?
This online calculator does not store your responses. When used in clinical settings, DUDIT results become part of your medical record and are protected by HIPAA and other confidentiality laws. Healthcare providers cannot share your substance use information without consent except in limited circumstances.
Related Addiction Medicine Calculators
Explore these related screening tools and calculators for comprehensive substance use assessment.
Need Help? Free Resources
24/7 Helplines
- 📞SAMHSA National Helpline: 1-800-662-4357
- 📞Crisis Text Line: Text HOME to 741741
- 📞National Suicide Prevention: 988
Online Resources
- 🌐FindTreatment.gov - Find local treatment
- 🌐NA.org - Narcotics Anonymous meetings
- 🌐SMART Recovery - Science-based support
Important Medical Disclaimer
DUDIT is a validated screening tool, not a diagnostic instrument. A positive screening result indicates the need for comprehensive assessment by a qualified healthcare professional. This calculator is for educational purposes only and should not replace professional medical advice.
If you or someone you know is experiencing a drug-related emergency, call 911 immediately. For confidential support and treatment referrals, contact SAMHSA's National Helpline at 1-800-662-4357 (free, confidential, 24/7, available in English and Spanish).