Herbal Disinfectants in Pharmaceutics: A Comprehensive Review of Curcumin and Neem Oil as Natural Antimicrobial Agents

The rising threat of antimicrobial resistance and the growing demand for natural, eco-friendly therapeutic options have renewed scientific and industrial interest in herbal disinfectants as potential alternatives to synthetic antimicrobial agents. Among these, curcumin (Curcuma longa) and neem oil (Azadirachta indica) have emerged as particularly promising candidates owing to their potent antimicrobial properties, favourable safety profiles, and suitability for pharmaceutical formulations. This review explores their antimicrobial mechanisms, pharmaceutical applications, formulation challenges, regulatory frameworks and safety considerations. Recent advances in nanotechnology, bioavailability enhancement strategies, and regulatory compliance are discussed in depth. Furthermore, this review highlights the current trends in personalised herbal medicine, standardisation challenges, and commercial viability of natural antimicrobial formulations. The review concludes that curcumin and neem oil hold substantial potential in pharmaceuticals, especially as sustainable and effective alternatives to conventional antimicrobial agents.