Persistent medical brain drain and policy response in Nigeria: impact on healthcare delivery and medical education

Nigeria faces an escalating physician brain drain that reflects a growing strain on both clinical care and medical education systems. Although chronic underfunding and insecurity are widely identified as key drivers of the “Japa” phenomenon, the situation is further complicated by the January 2024 federal directive to double medical school admission quotas without clearly documented, commensurate investment in training capacity, raising concerns about system readiness. This narrative policy review synthesizes evidence from peer-reviewed literature, government directives, and selected grey literature published between 2010 and 2025. Sources were purposively selected based on relevance to physician migration, health workforce dynamics, and medical education in Nigeria, with explicit inclusion of government reports and reputable media to capture recent policy developments. Data from 68 sources were thematically analysed using an integrated Systems Thinking framework integrated with the Push–Pull Theory of Migration to examine interactions between workforce attrition, training capacity, and policy responses. Physician emigration is driven by interacting economic, professional, and security-related push factors, reinforced by strong international pull mechanisms. The review identifies a set of self-reinforcing system dynamics, including workforce depletion, severe rural–urban maldistribution, rising clinician burnout, and attrition within postgraduate training pipelines. The loss of mid-career physicians erodes pedagogical capacity, weakening supervision, mentorship, and the sustainability of medical education. These pressures are further compounded by system-level constraints that limit service delivery and continuity of care. The 2024 admission quota expansion, introduced without a verified capacity audit, is interpreted as a policy shock that may exacerbate existing bottlenecks in clinical training and licensure, with potential downstream effects on graduate competence and migration intentions. This review highlights that sustainable workforce planning in Nigeria will likely depend on a transition from reactive directives to phased, capacity-first expansion. The findings suggest that retention strategies grounded in evidence-based financial and non-financial incentives, alongside structured diaspora engagement, may help mitigate ongoing workforce losses. Aligning policy responses with international frameworks is likely to be important in reducing the risk of unintended consequences, including the potential acceleration of physician emigration.