Why review anticholinergic burden for brain fog?
Review this score if brain fog, memory slips, dry mouth, constipation, trouble urinating, dizziness, falls, sleepiness, or confusion began after a new medicine or dose change. Several medicines can add to the same effect. This is a medicine review, not a blood test.
Combined effect
Several mild medicines can add up
A sleep aid, allergy drug, bladder medicine, antidepressant, nausea drug, or muscle relaxant may have a small effect alone. Together they can slow thinking.
Hidden OTC
Over-the-counter drugs also count
Diphenhydramine, doxylamine, and other older allergy or sleep drugs are often missing from the clinic's medicine list.
Medicine review
The score should lead to a safer plan
Find which medicines add most, keep treating the illness, and ask if a safer option or taper plan exists.
The prescriber must weigh the illness being treated, withdrawal and relapse risk, safer options, and what to watch after a change.
Save this test
Save the score and the medicines your clinician will review
Save the score, medicines that add most, timing, symptoms, and your next question for the visit.
My Fog keeps the medicine list, results, and notes you enter for your appointment.
What can change how you read this score?
Age, pregnancy, thinking problems, falls, driving, school, work, and the reason for each medicine all change how to use the score.
Children and teenagers
An adult score shouldn't be used to change a child's medicine. The child's prescriber should review allergy, nausea, bladder, mental health, seizure, and sleep medicines with the dose and reason for use.
Adults under 65
Younger adults can still have brain fog, slow thinking, constipation, dry mouth, or sleepiness from these medicines. Risk may rise after a dose change or when several drugs cause sleepiness. Most dementia studies looked at older adults.
Older adults
Older adults face more risk of confusion, falls, constipation, trouble urinating, dry mouth, sudden confusion, and drug interactions. A score of 3 or more should lead to a medicine review, not a sudden stop.
Pregnancy, postpartum, and breastfeeding
During pregnancy or breastfeeding, review allergy, nausea, bladder, mood, sleep, and pain medicines with the pregnancy team or prescriber. A score alone isn't a reason to stop them.
Dementia, mild thinking problems, delirium, and falls history
A review matters more for someone with thinking problems, sudden confusion, falls, or frailty. The plan must keep treating the illness while cutting medicine effects that are not needed.
Sex, bladder symptoms, and menopause-age care
Review bladder medicines, sleep aids, antidepressants, allergy drugs, and nausea medicines. If the brain fog began after a medicine change, check the timing before you blame hormones, stress, age, or anxiety.
How do you prepare for an anticholinergic burden review?
List every prescription and over-the-counter drug. Include sleep, allergy, nausea, bladder, pain, and mental health medicines, plus supplements, patches, drops, inhalers, and medicines used only as needed.
For each medicine, write the dose, time taken, start date, dose changes, and reason for use. Add any change in brain fog, sleepiness, memory, bowel or bladder problems, dizziness, falls, or driving.
Write down which score tool you use. Two tools may give the same medicine a different score, so keep the full medicine list with the total.
Ask your prescriber before you stop or lower a medicine. Some medicines, including benzodiazepines, antidepressants, antipsychotics, seizure and Parkinson's medicines, steroids, and long-term sleep medicines, may need a slow or closely watched change.
Score the whole list
Diphenhydramine and doxylamine sleep aids, older allergy drugs, bladder medicines, tricyclic antidepressants, muscle relaxants, nausea drugs, and medicines used only sometimes can affect the score.
Find which medicines add the most
Ask which one or two medicines add most of the score. Check whether you still need each one for the reason it was first given.
Ask about a safer change
Ask about a medicine with fewer anticholinergic effects, a new time or dose, a non-drug option, or a slow taper. The safe choice depends on what the medicine treats.
How do you read an anticholinergic burden score?
First make sure the medicine list is complete. Then find which drugs add most, whether symptoms began after them, and whether a safer change is possible.
Low score
No listed anticholinergic medicines, or low score on the chosen tool
Anticholinergic effects are less likely to be the main cause. Medicines may still slow thinking through sleepiness, poor sleep, changes in blood pressure or blood sugar, mood effects, or low nutrient levels.
Middle score
One anticholinergic medicine, several low-score medicines, or a score near a tool's review threshold
Find which medicines add most to the score. Check whether symptoms began after a start or dose change. Then ask whether each medicine still helps more than it harms.
High or high-risk score
Score of 3 or higher on common ACB-style tools, or strong anticholinergic medicine taken with other sedating medicines
Ask a clinician or pharmacist to review the list. This is more urgent with confusion, memory changes, falls, constipation, trouble passing urine, dry mouth, daytime sleepiness, or an existing thinking problem.
Use the score to plan a medicine review
Some medicines treat serious illness or need a slow taper. A clinician or pharmacist can help choose the safest change.
See research details
The score comes from your medicine list. Different tools may give different totals.
The tool adds up medicine effects. It doesn't measure your blood, brain chemicals, or lasting harm.
The 2023 AGS Beers Criteria links higher total exposure to falls, sudden confusion, and dementia risk in older adults. Their medicine lists should be reviewed.
Large studies link higher long-term exposure with dementia or mild thinking problems. One medicine or one score can't tell whether a person will develop dementia.
Cochrane and NICE support a careful medicine review. Research hasn't yet shown that lowering the score always improves thinking.
Keep the full medicine list and your symptoms with the total score.
What can you do before the visit?
List what you take, when you take it, and when symptoms happen. Mark which medicine you want the clinician or pharmacist to review first.
Put everything you take on one list
Bring bottles or photos if you don't know the names.
Mark when symptoms changed
Write the date of each start, stop, or dose change. Beside those dates, mark brain fog, sleepiness, constipation, dry mouth, trouble urinating, dizziness, falls, and mistakes while driving or working.
Ask for a pharmacist or prescriber review
Ask which medicines add most to the score, whether each is still needed, and what safer options exist. If a medicine will change, ask whether it needs a taper and what symptoms to watch.
Ask your prescriber before you stop or lower medicines because of this score. Get urgent help for sudden severe confusion, fainting, new weakness, chest pain, a severe allergic reaction, thoughts of suicide, a seizure, or signs of an overdose.
Save the medicine list with the symptom timeline
Keep these together
- Anticholinergic burden score, tool used, date, and every medicine included or left out.
- Dose, timing, start date, dose changes, stop dates, and over-the-counter use. Include sleep, allergy, nausea, bladder, pain, and mental health medicines. Add supplements, patches, drops, inhalers, and medicines taken only when needed.
- Brain fog, memory mistakes, sleepiness, dry mouth, constipation, urinary trouble, dizziness, falls, driving concerns, work or school errors, and when each changed.
- The question for the clinician or pharmacist: which medicines drive the score, which are still needed, and what safer change to try first?
Question for the visit
“Which medicines add most to the score? Is each still needed? Could a safer drug, new time or dose, or taper help? What should I watch for?”
Sources for Anticholinergic Burden Review
Tool purpose and clinician medication-review framing
Medication-review tools and anticholinergic burden calculators
Medication review, reconciliation, and patient decision support
Uncertainty about whether reducing burden improves cognition in dementia
Anticholinergic burden, falls, delirium, and dementia warnings in older adults
Cognitive decline and neuropsychiatric symptom prediction uncertainty
Scale quality and agreement limits
Beers Criteria PubMed record
Strong anticholinergic exposure and dementia association
Cumulative strong anticholinergic exposure and incident dementia
Anticholinergic burden in MCI or dementia
Systematic review and meta-analysis of anticholinergic drugs and dementia risk
Anticholinergic use and incident MCI or dementia
Anticholinergic effects, cognition, falls, and mortality meta-analysis
Clinical review of cognitive impact
ACB score, cognitive impairment, and mortality in older adults
Anticholinergics and transition to MCI in older primary-care adults
Alternatives to selected Beers Criteria medications
Anticholinergic deprescribing interventions for reducing risk of cognitive decline or dementia in older adults with and without prior cognitive impairment.
See each claim's sources
procedure
Anticholinergic burden tools estimate cumulative medication burden from the full medicine list and are meant to support medication review.safety
AGS Beers Criteria recommend considering total anticholinergic burden in older adults because cumulative exposure is associated with falls, delirium, and dementia risk.interpretation
Large observational studies associate cumulative anticholinergic exposure with dementia or MCI risk, but this does not prove that one score predicts an individual's future.interpretation
Reviews and cohort studies link anticholinergic exposure with cognitive impairment, delirium, falls, or mortality risk in older adults.limitation
Structured medication review is recommended, but evidence that deprescribing anticholinergic burden reliably improves cognition is limited and context-dependent.limitation
Anticholinergic burden scales differ in quality and agreement, so the medication list and clinical context should be reviewed with the score.