Background Prescribing, dispensing and administering pro re nata (PRN; as needed or necessary, as determined by an individual) medicines to people with intermittent or short-term conditions is a potential area for medication errors and inappropriate prescribing and administration. In people with dementia, regular PRN medicines use can demonstrate good practice when appropriate or poor in situations where their use is not recommended. However, the frequency of PRN prescription and administration within long-term care settings (care homes) for people with dementia is largely unknown. A limited number of studies worldwide suggest variation between countries. Objective To describe the prescription and administration rates of PRN medicines for people with dementia in UK care homes. Setting Fifty UK care homes. Method Medication details were collected from review of residents' medicines records within the care home for the previous month. Main outcome measure Prescription and administration of PRN medicines for the treatment of behaviours associated with neuropsychiatric symptoms and pain. Results The most commonly prescribed PRN medicines were analgesics (35.3%), although lower levels of PRN prescription were observed compared to recent studies. The percentage of residents receiving PRN administrations varied, with 20% for antipsychotics, 50% for benzodiazepines, 59% for analgesics, and 85.7% for nonbenzodiazepine hypnotics being administered. Conclusion Further research is needed to understand the decision making in PRN prescription and administration within long-term care. The prescribing of potentially inappropriate medicines remains a problem in long-term care settings and pharmacists have a key role in reducing inappropriate polypharmacy by undertaking medication reviews that consider both regular and PRN medicines.
Keywords: Analgesic; Antipsychotics; Dementia; Long-term care; Neuropsychiatric symptoms; Pain; Pro re nata; United Kingdom.