Lay summary
Polypharmacy is the prescribing of multiple medicines for an individual. Polypharmacy becomes problematic if medicines are prescribed inappropriately, or the intended benefit is not realised. Problematic polypharmacy is challenging for older adults, including kaumātua (Māori elders), due to higher rates of polypharmacy and risk of medicines-related harm. Evidence is limited for effective interventions that reduce problematic polypharmacy. The investigators developed a new pharmacist-led intervention for New Zealand primary care to optimise medicine use and minimise harm for older adults with polypharmacy. The intervention has been feasibility tested, refined for kaumātua, and generated several publications. The objectives for this project are: 1. Review the evidence for interventions to reduce problematic polypharmacy. 2. Establish a steering group to support the intervention. 3. Implement strategies to engage stakeholders. 4. Recruit an implementation team to deliver the intervention. The outcomes will facilitate the intervention's delivery nationwide and a randomised controlled trial across New Zealand.