Although recent studies have found that there is significant association between anticholinergic and cognitive impairment, especially in the elderly population, there seems to be minimal emphasis on anticholinergic burden (ACB) when prescribing medications to the inpatient psychogeriatric population.

To evaluate the prescribing patterns in Older Person Mental Health Inpatient Unit (OPMHU), whether the ACB Score on admission has been reviewed for lowest possible ACB while maintaining therapeutic effects. A protocol will be developed to ensure that ACB is reviewed for future admissions and discharges.

Fifty patients admitted and discharged from OPMHU are recruited retrospectively from 30th September 2015, excluding outliers and deceased patients. For those who had multiple admissions during that period, only the most recent admission would be included for evaluation. Individual ACB score is calculated on admission and discharge based on pharmacist final medication summary. Their mental health records are also audited for any documented ACB review by the treating team, while making note for any pre-existing cognitive impairment.

ACB has not been taken into consideration in all patients by the treating team on admission as well as when prescribing medications on discharge. Hence, it is unsurprising that the ACB score showed an increment of 30% on discharge (3.25) when compared to the admission score (2.5).

The study found that although ACB poses significant risks on cognitive impairment, this knowledge has not been employed pragmatically. A protocol should be developed to ensure that ACB is evaluated and managed accordingly.