ObjectivesTo systematically synthesise the results of primary qualitative studies on how community-dwelling older adults experience shared decision-making processes, express preferences and actively participate in care.DesignSystematic review of qualitative studies and qualitative meta-synthesis.MethodsWe focused on studies about community-dwelling participants aged ≥65 undergoing a health-disease process circumscribed to a primary healthcare setting, and the central theme should focus on either shared decision-making, expressing preferences or patient participation. We searched the following databases: MEDLINE, CINAHL, Web of Science, Scopus and PsycINFO (time publication frame 2012–2022). We excluded studies in those cases where the qualitative results were not analysed or unrelated to the phenomenon addressed, phenomena were not clear enough to be included or the setting did not occur in the community.ResultsA total of 12 studies were included in this meta-synthesis. We appraised the quality of the selected studies through Critical Appraisal Skills Programme (CASP) Checklist. The metasummary comprised the frequency and intensity of qualitative patterns across the included studies. The meta-synthesis revealed four influential elements in their interaction: recognising personal qualities, facing professional characteristics, experiences of discrimination and a double-edged context.ConclusionsThe phenomena studied were influenced by how older people approached their role in their binomial relationship with healthcare professionals. Those with a reinforced self-concept were better aware of health-disease-related situations regarding shared decision-making and the importance of being communicatively assertive. Professional characteristics were also crucial in how older people modulated their acting ability through their personality, communication skills and the approach healthcare professionals used towards older adults. Situations of discrimination generated through an imbalance of power inhibited the expression of preferences and hindered the active participation of older people. The context surrounding the participants influenced all these situations, key in tipping the balance between a therapeutic and a harmful side.PROSPERO registration numberCRD42022363515.