COWS Score Calculator

COWS Score Calculator for Psychiatry. The source bands are 5-12 mild, 13-24 moderate, 25-36 moderately severe, and above 36 severe. These describe the recorded assessment and do not determine a diagnosis, induction protocol or overdose risk.

For shared guidance on choosing a tool and documenting results, read the clinical calculator workflow.

How this calculator works

The NIDA-hosted original clinician instrument has 11 items. Their maximum values sum to 48. Only the externally completed total is entered here: https://nida.nih.gov/sites/default/files/cows.pdf.

When to use this calculator

Check a withdrawal record before comparing serial totals. Ensure the assessment concerns opioid withdrawal rather than substituting a symptom count or a score for another substance.

Inputs used

  • Complete original COWS total, integer 0-48
  • Same assessment time and clinician-attributed withdrawal context

Clinical interpretation

The source bands are 5-12 mild, 13-24 moderate, 25-36 moderately severe, and above 36 severe. These describe the recorded assessment and do not determine a diagnosis, induction protocol or overdose risk.

Worked example

Totals of 4 and 5 fall on opposite sides of the published mild band. A total of 4 is now labelled below that band, not mild withdrawal. At 12 and 13, the displayed bands change from mild to moderate; this is not a medication-start instruction.

Limitations and safety notes

Fever, anxiety and other causes may confound symptoms. Timing of opioid exposure and clinical context remain important. No questionnaire, examination directions or drug dosing rule is reproduced.

Frequently asked questions

Is a lower follow-up total proof that all withdrawal risk has passed?

No. It describes that assessment, not future course. Preserve the timing, interventions and relevant clinical observations when comparing results.

References

  • https://nida.nih.gov/sites/default/files/cows.pdf
  • https://datashare.nida.nih.gov/instrument/clinical-opiate-withdrawal-scale

Editorial review and citation methodology

Maintained by the Quick Medical Calculator Editorial Team. Content record date: September 9, 2026. A content date is not evidence of independent clinical review. Individual clinical sign-off is not recorded on this page.

  • Prefer original validation studies for scoring systems and prediction tools.
  • Use current specialty society guidance, transplant allocation policy, public health guidance, or regulator resources when they govern clinical use.
  • Include limitations and safety notes when a calculator is population-specific, context-dependent, or unsuitable as a standalone decision tool.

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