anticholinergic cognitive burden (ACB) scale
The anticholinergic cognitive burden (ACB) scale and other lists with similar names are methods of quantifying the risk of harm to people taking medicines with anticholinergic activity. Anticholinergic medicines are associated with an increased risk of cognitive impairment , falls  and delirium 
drugs other than those given for their anticholinergic properties, e.g. antihistamines and antipsychotics, are included on the list
- the risk is cumulative, so to calculate the overall risk, the score is added up for each of the medicines being taken being taken. A score of three or more is significant, but risks are thought to increase further with higher scores.
Some examples [source 4] - this is by no means exhaustive:
ACB score 1
ACB score 2
ACB score 3
Contributor: Dr Nick Bradshaw (January 2014)
 Campbell N, Boustani M, Limbil T, Ott C, Fox C, Maidment I, Schubert CC, Munger S, Fick D, Miller D, Gulati R.The cognitive impact of anticholinergics: a clinical review.Clin Interv Aging. 2009;4:225-33. Epub 2009 Jun 9. Review.
 Aizenberg D, Sigler M, Weizman A, Barak Y.Anticholinergic burden and the risk of falls among elderly psychiatric inpatients: a 4-year case-control study.Int Psychogeriatr. 2002 Sep;14(3):307-10.
 Best O, Gnjidic D, Hilmer SN, Naganathan V, McLachlan AJ.Investigating polypharmacy and drug burden index in hospitalised older people.Intern Med J. 2013 Aug;43(8):912-8. doi: 10.1111/imj.12203.
Last reviewed 01/2018