ACB Score Calculator
Estimate your Anticholinergic Cognitive Burden (ACB) score by adding medicines and their ACB values (0 to 3). This tool is for education and discussion with a clinician.
| Medication | ACB Value | Action |
|---|---|---|
| No medications added yet. | ||
Current total: 0
Note: ACB values can vary by reference source and region. Always verify with your healthcare professional.
What is an ACB score?
The ACB score (Anticholinergic Cognitive Burden score) is a way to estimate how much anticholinergic effect a person may be exposed to from their medication list. Medicines with anticholinergic properties can sometimes affect memory, alertness, and physical function, especially in older adults.
Each medicine is assigned a value, and those values are added together. A higher total can indicate greater potential risk of side effects related to anticholinergic burden.
How ACB values are typically used
- 0: no known clinically relevant anticholinergic activity
- 1: possible or mild anticholinergic activity
- 2: definite anticholinergic activity
- 3: marked anticholinergic activity, often with stronger clinical impact
How to use this ACB score calculator
- Add each medicine from the current medication list.
- Enter the ACB value for each medicine (or use the quick-select list).
- Click Calculate ACB Score to get the total.
- Use the result as a discussion point with your doctor or pharmacist.
This approach is helpful when reviewing polypharmacy, memory concerns, falls risk, confusion, dry mouth, constipation, or urinary retention.
How to interpret your total score
Many clinicians use this kind of practical interpretation:
- 0: Minimal anticholinergic burden
- 1-2: Low burden; monitor symptoms
- 3-5: Moderate burden; medication review is reasonable
- 6+: High burden; prioritize medication optimization with a clinician
A score alone does not diagnose disease. Context matters: dose, treatment duration, kidney and liver function, age, cognition, and other health conditions all influence real-world risk.
Why anticholinergic burden matters
Common symptoms linked to higher burden
- Drowsiness or daytime sedation
- Brain fog, slower thinking, attention problems
- Dry mouth and dry eyes
- Constipation
- Urinary difficulty
- Dizziness and increased falls risk
Who may be more vulnerable?
Older adults, people with memory disorders, and those taking multiple CNS-active medications may be more sensitive to anticholinergic effects. If you are caring for an older family member, checking anticholinergic burden can be a useful part of medication safety planning.
Practical steps if your score is high
- Request a formal medication review with your primary care provider or pharmacist.
- Ask whether lower-anticholinergic alternatives exist for each medication.
- Do not stop medicines abruptly unless your clinician advises it.
- Track symptoms before and after medication adjustments.
- Recalculate after changes to see if burden is trending down.
Limitations of online ACB tools
Online calculators are screening aids, not diagnostic instruments. Drug scoring systems differ, and your local prescribing standards may use a slightly different list. Also, a low score does not guarantee zero side effects, and a high score does not mean every medicine must be stopped.
The best use of this calculator is to support a safer, better-informed conversation with your healthcare team.
FAQ
Can I use this calculator for any country?
Yes, as a general educational estimate. But medication names and score references can vary by country and formulary.
Is a score of 3 dangerous?
Not automatically. It means anticholinergic burden may be clinically meaningful and deserves review, particularly in older adults or if symptoms are present.
Should I stop medications if my score is high?
No. Never stop prescription treatment on your own. Talk to your clinician about whether safer alternatives or gradual deprescribing options are appropriate.