What does CIWA stand for?

CIWA stands for Clinical Institute Withdrawal Assessment. The revised version, CIWA-Ar, serves as the standard 10-item scale for assessing alcohol withdrawal severity. Researchers developed it in 1989 at the Addiction Research Foundation in Toronto.

What is the difference between CIWA and COWS?

CIWA-Ar assesses alcohol withdrawal (10 items, total 0-67). COWS assesses opioid withdrawal (11 items, total 0-48). They measure different withdrawal syndromes and should never be used interchangeably.

What CIWA score requires medication?

Most protocols trigger PRN benzodiazepines at a CIWA-Ar score of 10 or above, but thresholds vary by institution. Always follow your unit's specific protocol instead of generic guidelines.

How often should CIWA be scored?

Frequency depends on the score and your unit's protocol. Common intervals: every 1 hour if the score is above 8, every 2 hours if stable in the 5-8 range, every 4 hours if stable and below 5. After administering PRN medication, reassess within 30-60 minutes.

By Miranda, Nursing Student (BSN candidate)

This guide is currently pending review by a licensed clinical nurse.

Last updated: April 11, 2026

CIWA and COWS Documentation: A Nursing Guide to Withdrawal Scoring

Your patient is in alcohol withdrawal, and you just received the CIWA sheet for the first time. During my last rotation, I encountered it - 10 items with unclear criteria ("mild tremor" vs. "moderate tremor"?), a protocol that instructs you to medicate based on the total, and an hourly reassessment schedule. Here's what finally clicked for me regarding how to score it and how to chart it.

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Why This Matters

Regulatory bodies: Centers for Medicare & Medicaid Services (CMS), The Joint Commission, American Society of Addiction Medicine (ASAM)

Unrecognized or undertreated alcohol withdrawal carries approximately 5% mortality. CIWA serves as a safety tool rather than a paperwork exercise. Although opioid withdrawal is less immediately lethal, it still causes significant patient harm and increases the risk of elopement. Protocol-driven medication, such as lorazepam PRN for CIWA ≥10, means the score directly triggers a clinical action; an incorrect score results in an inappropriate action. Gaps in CIWA documentation during active withdrawal frequently appear in surveys and pose a medico-legal risk.

Assessment of alcohol withdrawal: the revised CIWA-Ar scale — Sullivan JT et al. Br J Addict. 1989;84(11):1353-1357 (1989)
The Clinical Opiate Withdrawal Scale (COWS) — Wesson DR, Ling W. J Psychoactive Drugs. 2003;35(2):253-259 (2003)
Alcohol Withdrawal — Newman RK et al. StatPearls Publishing (Updated 2024) (2024)
Opioid Withdrawal — Shah M, Huecker MR. StatPearls Publishing (Updated 2023) (2023)
Clinical Practice Guideline on Alcohol Withdrawal Management — American Society of Addiction Medicine (ASAM) (2020)

What CIWA-Ar Measures

The CIWA-Ar (Clinical Institute Withdrawal Assessment for Alcohol, revised) is a 10-item scale that assesses the severity of alcohol withdrawal. Each item scores between 0 and 7, except for orientation, which scores between 0 and 4. The total range is 0-67, though scores above 45 are rare in practice. Sullivan, Sykora, Schneiderman, Naranjo, and Sellers developed the CIWA-Ar at the Addiction Research Foundation in Toronto, publishing it in 1989. This scale replaced the original CIWA, which lacked robust validation. Clinicians use it in detox units, medical and psychiatric admissions, emergency departments, and ICUs - anywhere a patient may experience alcohol withdrawal. The 10 items include: nausea and vomiting (0-7), tremor (0-7), paroxysmal sweats (0-7), anxiety (0-7), agitation (0-7), tactile disturbances (0-7), auditory disturbances (0-7), visual disturbances (0-7), headache/fullness in head (0-7), and orientation/clouding of sensorium (0-4).

How to score each CIWA item

Most CIWA items use a 0-7 descriptive scale where 0 means the symptom is not present and 7 means the symptom is at its most severe. Use the standardized descriptors on the scoring sheet, not your own interpretation. For tremor: 0 = no tremor, 1 = not visible but can be felt fingertip to fingertip, 4 = moderate with arms extended, 7 = severe even with arms not extended. For anxiety: 0 = no anxiety, 1 = mildly anxious, 4 = moderately anxious/guarded, 7 = equivalent to acute panic states. For tactile disturbances: 0 = none, 1 = very mild itching/pins and needles/burning/numbness, 4 = moderate hallucinations, 7 = continuous hallucinations. Scoring is subjective for many items - consistency across assessors is a known challenge. The best defense: document WHAT you observed alongside the score. "Tremor 4 (moderate, visible with arms extended)" is more defensible than "Tremor 4" alone.

What COWS Measures

The COWS (Clinical Opiate Withdrawal Scale) is an 11-item scale that assesses the severity of opioid withdrawal. Unlike CIWA, the items use variable scales, with some ranging from 0-4 and others from 0-5. The total score ranges from 0 to 48. The 11 items include resting pulse rate (0-4), sweating (0-4), restlessness (0-5), pupil size (0-5), bone or joint aches (0-4), runny nose or tearing (0-4), GI upset (0-5), tremor (0-4), yawning (0-4), anxiety or irritability (0-4), and gooseflesh skin (0-5). Wesson and Ling published COWS in 2003, and it is most commonly used during methadone or buprenorphine induction; the score determines whether the patient is experiencing sufficient withdrawal to safely begin medication-assisted treatment. Additionally, COWS is used in detox and during medical admissions for patients with opioid use disorder. Note: benzodiazepine withdrawal has its own assessment tool (CIWA-B), which is less widely used. Do not use CIWA-Ar or COWS for benzodiazepine withdrawal without confirming with the ordering provider.

Scoring and Documentation Workflow

Both CIWA and COWS assessments follow the same workflow.

Step 1: Assess at the ordered interval. Step 2: Score each item per the standardized descriptors. Step 3: Sum the total. Step 4: Compare the total to your unit's protocol thresholds. Step 5: Administer medication if the protocol indicates and you have an active order. Step 6: Document everything - time, item scores, total, action taken, and reassessment plan. Step 7: Schedule the next assessment per the protocol. This is a loop, not a one-time event. After medication administration, reassess within 30-60 minutes (per protocol) to document the response. That reassessment is part of the loop - don't skip it.

What to Document for Each Assessment

A complete CIWA or COWS chart entry has 6 pieces of information.

1. Time of assessment (military time - CIWA/COWS are time-sensitive and protocols are interval-based). 2. Item-level scores (not just the total). 3. Total score. 4. Protocol action taken (medication given, none needed, or escalated to MD). 5. Patient response (if medication was given and you have reassessed). 6. Time of next scheduled assessment. Example format: "1400 CIWA-Ar 12 (Nausea 2, Tremor 4, Sweats 3, Anxiety 2, Agit 1, Tactile 0, Auditory 0, Visual 0, Headache 0, Orient 0). Per protocol: lorazepam 2mg PO given at 1405. Next assessment 1500."

Protocol Interpretation Basics

CIWA and COWS protocols vary by institution - always use YOUR unit's protocol, not a generic one from the internet. That said, most follow a common pattern. Typical CIWA protocol: score <10 - no medication, monitor per schedule. Score 10-18 - PRN benzodiazepine (usually lorazepam 1-2mg or diazepam 5-10mg). Score ≥19 - PRN medication plus MD notification; some protocols move to fixed-schedule dosing above this threshold. Typical COWS protocol: score <5 - not yet in withdrawal, defer medication-assisted treatment induction. Score 5-12 - mild withdrawal, may be in induction range for buprenorphine. Score ≥13 - moderate to severe withdrawal, supports continuing treatment. Know your protocol's re-score intervals: commonly Q1h if the score is elevated, Q2h if stable mid-range, Q4h if stable and low.

Medication Compliance Tracking

In addition to withdrawal scoring, medical monitoring involves tracking psychiatric medication compliance.

For psychiatric patients, medication compliance is a critical documentation category. The NurseChartingPro framework uses three categories: compliant, partial, and refusing. For partial compliance or refusal, document the reason in the patient's own words if they give one: "Refused 0800 risperidone, stated 'it makes me feel numb.'" Then document your intervention: "Educated patient on importance of antipsychotic adherence for symptom management. Offered to discuss with provider at rounds. Patient agreed to reconsider at noon medication pass." Finally, document the outcome: "1200 - patient accepted risperidone with noon medications." Psychiatric medication compliance is directly tied to relapse risk and is a quality measure on many units. Complete documentation of the refusal-education-outcome loop demonstrates nursing judgment and protects the care team.

Common Mistakes

Documenting Only the Total Score

Weak: 1400 CIWA 12.

Strong: 1400 CIWA-Ar 12 (Nausea 2, Tremor 4, Sweats 3, Anxiety 2, Agit 1, Tactile 0, Auditory 0, Visual 0, Headache 0, Orient 0).

Protocols often trigger differently based on elevated items. A total score of 12 driven by tremor and sweats presents a different clinical picture than one driven by agitation and tactile hallucinations. The individual components guide the next action.

Skipping assessments when the patient seems stable

Weak: No CIWA documentation occurred between 0800 and 1400 because the patient was sleeping.

Strong: 0900 CIWA-Ar 3, stable, patient resting comfortably. Next assessment 1100 per Q2h protocol.

Protocol gaps appear as missed assessments during surveys and legal reviews. "No news" does not qualify as documentation. Even a low score requires documentation at the ordered interval.

Not Documenting the Medication Response

Weak: Lorazepam 2mg given at 1405.

Strong: Lorazepam 2mg PO given at 1405. Reassessment at 1435: CIWA-Ar 8 (down from 12). Patient calm, resting comfortably. Tremor improved from 4 to 2.

The CIWA protocol follows a loop: assess, medicate, and reassess. Without the post-medication reassessment, you cannot demonstrate that the intervention was effective or justify the next interval.

Vague descriptor language instead of scores

Weak: Patient appears anxious and tremulous.

Strong: Anxiety 3 (moderately anxious, guarded posture). Tremor 4 (visible with arms extended). Patient states, "I feel like I'm climbing out of my skin."

"Appears anxious" is not a CIWA score. Each item has standardized descriptors; use the descriptor and the number. Including the patient's own words in quotes strengthens the documentation.

Using the Wrong Scale for Withdrawal Assessment

Weak: Scoring a patient experiencing benzodiazepine withdrawal with CIWA-Ar.

Strong: CIWA-Ar is validated for alcohol withdrawal. Benzodiazepine withdrawal requires a different assessment tool (CIWA-B). Confirm the appropriate scale with the ordering provider.

CIWA-Ar was developed and validated specifically for alcohol withdrawal. Off-label use for other withdrawal types can lead to misleading scores and inappropriate medication triggers.

Ms. RamirezAge 54 — Alcohol withdrawal (last drink ~18 hours ago)

fictional patient

Scenario

You're the day shift RN on a medical floor. Ms. Ramirez was admitted overnight for alcohol withdrawal. CIWA-Ar protocol ordered: Q2h scoring for 6 hours, then re-evaluate. Night shift's last CIWA at 0600 was 6. You pick up the patient at 0700.

Chart Entry

0800 CIWA-Ar 8 (Nausea 1, Tremor 2, Sweats 2, Anxiety 2, Agitation 1, Tactile 0, Auditory 0, Visual 0, Headache 0, Orientation 0). Patient reports mild nausea and exhibits a visible fine tremor with arms extended. A/O x4. Per protocol, no medication at score <10. Next assessment 1000.

1000 CIWA-Ar 14 (Nausea 3, Tremor 3, Sweats 3, Anxiety 3, Agitation 1, Tactile 1, Auditory 0, Visual 0, Headache 1, Orientation 0). Score is rising. Patient reports, "my skin is crawling a little." Per protocol: lorazepam 2mg PO administered at 1005. Reassessment in 30 min per protocol.

1035 CIWA-Ar 9 (Nausea 2, Tremor 2, Sweats 2, Anxiety 2, Agitation 0, Tactile 0, Auditory 0, Visual 0, Headache 1, Orientation 0). Significant improvement follows lorazepam. Patient is resting but arousable. Next scheduled assessment 1200.

1200 CIWA-Ar 8 (Nausea 2, Tremor 2, Sweats 1, Anxiety 2, Agitation 0, Tactile 0, Auditory 0, Visual 0, Headache 1, Orientation 0). Patient is stable. No additional medication. Next assessment 1400.

1400 CIWA-Ar 6 (Nausea 1, Tremor 1, Sweats 1, Anxiety 2, Agitation 0, Tactile 0, Auditory 0, Visual 0, Headache 1, Orientation 0). Score is trending down. Per protocol, the reassessment interval extends to Q4h. Next assessment 1800. MD updated on downtrend.

Annotations

Item-level detail:: Every entry includes all 10 item scores, not just the total - shows which symptoms are driving the score.
Protocol linkage:: The 1000 entry explicitly connects the score to the protocol action: "Per protocol: lorazepam 2mg PO."
Reassessment loop:: The 1035 entry documents the post-medication reassessment - closing the assess-medicate-reassess loop.
Interval change:: The 1400 entry documents the interval extension with justification: "Trending down. Per protocol."

Pro Tips

Remember the 10 CIWA items: N-T-S-A-A-T-A-V-H-O: Nausea, Tremor, Sweats, Anxiety, Agitation, Tactile, Auditory, Visual, Headache, Orientation. Although it's not elegant, reviewing this list helps you avoid missing items during a busy shift.
Document item-level scores every time: Spending an extra minute to document item-level scores pays off when the MD asks, "What specifically was elevated?" A total of 14 holds no clinical significance without knowing which items are driving it.
Escalate before the protocol indicates if scores are rising quickly: When CIWA rises from 8 to 14 to 20 in two hours, this indicates rapid withdrawal progression - a high-mortality scenario. Use your clinical judgment to call the MD early and document it: "CIWA rising rapidly, MD notified ahead of protocol threshold."
Document Medication Refusals in the Patient's Own Words: "Refused 0800 medications, stated 'I don't like how they make me feel'" is much stronger documentation than "refused medications." The quote shows you assessed the reason and creates a foundation for the education you provide next.
CIWA and COWS are separate scales - don't mix them: Some patients have both alcohol and opioid use disorder and may need both assessments. Document each scale separately, using its full name (CIWA-Ar, COWS), and never combine the scores.

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