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Pharmaceutical technology evaluation has traditionally been organized around pharmacokinetic performance, with bioavailability occupying a privileged position as a marker of formulation success. This emphasis has been scientifically productive because it links dosage form design to systemic exposure and supports comparability across products. Yet bioavailability captures only one part of the pathway between a pharmaceutical technology and sustained therapeutic benefit. A product may deliver favorable exposure under controlled conditions while still failing when introduced into everyday patient use. The central problem is that bioavailability-centered evaluation often assumes idealized conditions of administration, storage, handling, and persistence. In practice, patients must swallow, inject, inhale, store, prepare, remember, tolerate, and continue medicines within complex personal and healthcare environments. Technologies that improve exposure may therefore generate limited value if they are difficult to use, fragile under real-world variability, or unable to support continuity of treatment over time. This creates a gap between technical success and therapeutic success. The objective of this article is to propose a systems-based evaluation model for pharmaceutical technologies. The model treats usability, robustness, and therapeutic continuity as co-equal dimensions that complement traditional pharmacokinetic endpoints. Usability captures the human–technology interface, robustness captures performance consistency under realistic variability, and therapeutic continuity captures sustained benefit across time and care settings. Together, these dimensions broaden the meaning of pharmaceutical performance. The proposed model defines each dimension, explains their interactions, and translates them into a practical evaluation framework. It argues that usability, robustness, and therapeutic continuity should not be treated as late-stage refinements after bioavailability has been optimized. Instead, they should be incorporated early in product design and carried through development, assessment, and post-translation evaluation. Two tables are used to contrast the dominant bioavailability-centered paradigm with a systems-based view and to present the operational structure of the proposed model. Adopting a systems-based evaluation paradigm can help pharmaceutical technologies become not only pharmacokinetically effective but also usable, resilient, and capable of sustaining therapeutic benefit in practice. Such a shift does not diminish the importance of bioavailability. It places bioavailability within a broader causal architecture of real-world performance. The result is a more complete foundation for pharmaceutical technology assessment and patient-centered product development.

Advanced drug delivery systems promise more precise, durable, and patient-centred therapy through nanomedicines, long-acting formulations, implantable platforms, smart delivery devices, and personalised dosage forms. These technologies can reduce dosing burden, improve therapeutic control, and expand the design space of pharmaceutical care. Yet the same sophistication that makes them attractive can also make them expensive, infrastructure-dependent, and difficult to use. The equity implications of these technologies therefore require systematic attention. The central problem addressed in this article is that pharmaceutical innovation is often evaluated through performance, safety, manufacturability, and market value, while equity remains treated as a downstream access issue. This creates a risk that advanced drug delivery systems will reach populations already well served by health systems while excluding communities facing poverty, geographic isolation, disability, low literacy, weak infrastructure, or limited digital access. Equity cannot be repaired only after launch if exclusion has already been built into the technology. It must be considered during design, development, evaluation, pricing, procurement, and implementation. This article develops the concept of pharmaceutical technology equity as a deliberate design and policy goal for advanced drug delivery systems. It argues that equitable pharmaceutical technology requires simultaneous attention to access, affordability, and usability. Access concerns whether the technology can physically and institutionally reach the people who need it. Affordability concerns whether patients and health systems can obtain it without unacceptable financial burden, while usability concerns whether diverse users can safely and effectively engage with the product in real settings. The article defines pharmaceutical technology equity, identifies structural barriers, and proposes design principles for inclusive advanced drug delivery systems. Four tables support the argument by defining equity logic, cataloguing access barriers, mapping design principles, and presenting a decision-oriented framework. The core conclusion is that equity must become an explicit and measurable goal of pharmaceutical technology development. Advanced drug delivery should not merely produce better products for privileged users; it should expand therapeutic capability for populations historically excluded from high-value innovation.