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Central nervous system (CNS) disorders, such as Alzheimer’s disease (AD), Parkinson’s disease (PD), and Schizophrenia (Sch) present significant challenges for healthcare systems, both in terms of prevalence and the complexity of pharmacological treatment. While current therapies offer symptomatic relief, there is a high rate of failure in addressing the full spectrum of clinical symptoms and patient adherence issues, especially in long-term care. Since ancient times, various civilizations, including the Chinese, Egyptians, and indigenous South African cultures, have investigated and utilized the transdermal route for therapeutic and medicinal applications. Recent advances in transdermal drug delivery systems (TDS) offer a promising alternative to traditional routes of administration, enhancing drug absorption and minimizing side effects, such as gastrointestinal distress. This review explores the potential of TDS for improving the pharmacotherapy of AD, PD, and Sch. We also highlight the ongoing challenges in optimizing TDS formulations, such as drug absorption through the skin, skin irritation, and maintaining therapeutic efficacy. Furthermore, the review discusses the progress in prodrug design strategies aimed at enhancing skin permeation and bioavailability, particularly in the context of CNS-targeted drugs. The need for continued research into TDS technology is emphasized, as it holds promise for improving treatment adherence, patient quality of life, and caregiver burden, thereby advancing therapeutic options for CNS disorders.
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