Exploring Novel Phytochemicals as Strategies in the Fight Against Antimicrobial Resistance

Abstract

Antimicrobial resistance (AMR) is accelerating worldwide and is eroding the effectiveness of frontline antibiotics, driving treatment failure, prolonged illness, higher costs, and avoidable mortality. Medicinal plants have proven to be a potential source of natural new antimicrobials owing to their richness in diverse bioactive compounds called phytochemicals. One appealing thing about these phytochemicals is that they work against multiple targets at once. They break down microbial cell walls, stop biofilm formation, and prevent essential enzymes from working, which may lower the chance of resistance developing. They can also synergize with existing antibiotics. Synthetic antibiotics, however, are not eco-friendly or desirable from the perspective of sustainability, and plant-derived compounds provide an eco-friendly and sustainable strategy to counteract AM.However, key challenges remain, including variable phytochemical composition across plant sources, limited standardization of extraction and susceptibility testing, incomplete mechanistic validation, and gaps in safety, bioavailability, pharmacokinetics, and drug–herb interaction data. Future work should prioritize rigorous chemical profiling and quality control, harmonized in vitro assays linked to clinically relevant endpoints, mechanism-led combination studies against multidrug-resistant (MDR) pathogens, and well-designed in vivo and clinical evaluations supported by scalable formulation and delivery approaches. Overall, strategically developed phytochemicals, particularly as antibiotic adjuvants could help extend the useful life of current antimicrobials and contribute to integrated AMR mitigation efforts. Drawing on the promise of medicinal plants to battle AMR, this mini-review advocates for interdisciplinary research and policy support to enable the therapeutic potential of phytochemicals to combat this critically important global health issue.