Little is known about how nurses adapt medication administration practices to preserve safety. The capacity to adapt and respond before harm occurs has been labelled 'resilience'. Current evidence examining medication safety largely focuses on errors and what goes wrong. This review aimed to synthesise evidence for the application of resilience principles and practices in nursing medication administration. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses guided the review, which was registered with PROSPERO. MEDLINE, EMBASE, PsychINFO and CINAHL databases were searched from 14 August 2020 to 1 January 2021 for English-language studies. A systematic review of empirical studies of any design relating to resilience and safety in nursing medication administration in the inpatient setting was conducted. Methodological quality was appraised using the Mixed Methods Appraisal Tool. Data were synthesised thematically. Thirty-two studies with a range of methodologies of mostly good quality met the inclusion criteria. Eleven interventional studies included two that evaluated the effectiveness of education interventions and nine exploratory studies with outcomes showing the impact of an intervention designed or examined to build resilience. Twenty-one non-interventional studies showed how resilience principles are put into practice. Only three studies explicitly named the concept of resilience. Resilient medication administration strategies result from five triggers. Nurses' resilience practices were found to be responses to identified trigers that threaten safety and productivity. These were often short term, real-time proactive adaptations to preserve safety, compensating for and responding to complexities in the modern healthcare setting. CRD42018087928.