Polyherbal Transdermal Strategies for Sleep Management: Therapeutic Potential of Valerian (Valeriana Officinalis), Jatamansi (Nardostachys Jatamansi), Chamomile (Matricaria Chamomilla), And Tomato Peel-Derived Biopolymeric Forehead Sheets

Abstract

Sleep disorders represent a growing global health challenge, affecting millions of individuals and contributing to impaired cognitive performance, reduced quality of life, and increased risk of chronic diseases. Although conventional hypnotic medications remain the primary therapeutic option for insomnia and related sleep disturbances, their long-term use is often associated with adverse effects including tolerance, dependence, residual sedation, and impaired daytime functioning. Consequently, increasing attention has been directed toward plant-based interventions that offer favorable safety profiles and multimodal pharmacological actions. Among medicinal plants traditionally employed for sleep promotion, Valeriana officinalis, Nardostachys jatamansi, and Matricaria chamomilla have attracted substantial scientific interest due to their sedative, anxiolytic, neuroprotective, and sleep-enhancing properties. The bioactive constituents of these plants, including valerenic acid, valepotriates, jatamansone, apigenin, flavonoids, and volatile terpenoids, have been reported to modulate neurotransmitter systems involved in sleep regulation, particularly γ-aminobutyric acid (GABA), serotonin, melatonin, and related neurochemical pathways. The integration of these botanicals into a polyherbal formulation may provide synergistic therapeutic benefits through complementary mechanisms of action targeting multiple aspects of sleep physiology. Recent advances in transdermal drug delivery have created new opportunities for the administration of herbal bioactives through non-invasive and patient-friendly dosage forms. Simultaneously, growing emphasis on sustainable pharmaceutical development has encouraged the exploration of renewable biomaterials as functional carriers. Tomato peel, an abundant agro-industrial by-product, represents a promising source of natural polymers including pectin, cellulose, and hemicellulose, which possess excellent film-forming and biodegradable characteristics suitable for pharmaceutical applications. This review critically examines the neurobiological basis of sleep regulation, the pharmacological evidence supporting the sleep-promoting activities of valerian, jatamansi, and chamomile, and the scientific rationale underlying polyherbal therapeutic approaches. Furthermore, the potential application of tomato peel-derived biopolymers in the development of herbal serum-loaded forehead sheets is discussed, with particular emphasis on formulation design, transdermal delivery, sustainability, and future research directions. The convergence of phytotherapy and biodegradable polymer technology may offer an innovative strategy for developing safe, eco-friendly, and patient-centric interventions for sleep support.