Stakeholders' perspectives about challenges, strategies and outcomes of importance associated with adherence to appropriate polypharmacy in older patients – A qualitative study

Older patients experience challenges when taking polypharmacy. Studies have applied different interventions to improve adherence to polypharmacy. However, inconsistencies in outcomes have impeded the synthesis of evidence. To generate high-quality studies and selectively report outcomes, a Core Outcome Set (COS) is advocated.