1. Aging is your patient taking too many pills? Before you prescribe another drug, consider whether new symptoms might be caused by the medications the patient is already taking;Weiss BD;J FAM Practice,2012
2. Polypharmacy: a risk factor for geriatric syndrome;Abdulraheem I;Morbidity Mortality Aging Sci,2013
3. Risk Factors for Adverse Drug Events Among Nursing Home Residents
4. Polypharmacy in the elderly: A literature review
5. Health Quality and Safety Commission New Zealand (HQSCNZ).Polypharmacy in people aged 65 and over: Health quality & safety commission new zealand 2017.https://www.hqsc.govt.nz/our-programmes/health-quality-evaluation/projects/atlas-of-healthcare-variation/polypharmacy/.