1. Duerden M, Avery T, Payne R (2013) Polypharmacy and medicines optimisation. The King's Fund, London
2. National Institute for Health and Care Excellence (2015) Medicines Optimisation: The Safe and Effective Use of Medicines to Enable the Best Possible Outcomes. Guideline No. 5. NICE, London
3. Polypharmacy - appropriate, problematic or both?