Medicinal plants have been essential for human health for millennia. This review argues that an interdisciplinary approach combining evolutionary ecology, molecular biology/biochemistry, and ethnopharmacology can lead to new breakthroughs in science, including pharmacological discoveries and advancements in human health. Such research integrates data and methods across space, time, and species, building on traditional Indigenous knowledge. This contrasts with past research that oversimplified plant-human relationships and overlooked important discoveries. Medicinal plants and humans should be viewed as partners with complex interactions, including domestication, commensalism, and mutualism. Medicinal plants are not just chemical factories but symbiotic partners that have shaped societies and improved health. Medicinal plants are used in various cultures for physical, mental, and spiritual health. Many species have therapeutic value, and their use has been facilitated by human efforts to enhance their diversity. Despite their cultural significance, most medicinal plant uses have not been clinically evaluated. Only 16% of plants thought to have therapeutic value have been tested for biological activity. Most research on medicinal plants is based on early 20th-century efforts focusing on biochemical characterization and pharmacological activity. Many drugs in use are synthetic analogs of plant secondary metabolites. However, the pharmacological industry increasingly uses synthetic compounds for screening. Despite this, many new drugs are derived from nature, mostly plants. Evolutionary ecology helps understand species origins, interactions, and adaptations. It is rarely included in medical education but is increasingly applied to medicinal plant research. Advances in evolutionary ecology improve the discovery and identification of medicinal plants through online data, DNA barcoding, and species delimitation. DNA barcoding can identify specimens from juvenile plants or poor quality material, but short barcodes often fail to distinguish close relatives. Metabolomic analysis offers an alternative but may be less reliable for species identification due to variability in plant chemistry. Phylogenomic approaches are crucial for understanding the origins and spread of medicinal plants, identifying evolutionary 'hot zones', and their wild relatives. These approaches can also predict and explain plant species for therapeutic molecules. Phylogenomic studies have identified evolutionary hot zones with reported antimalarial use. These findings highlight the importance of integrating traditional knowledge with scientific research. Medicinal plant trait ecology examines how functional traits affect species fitness. These traits are essential for understanding early use and domestication of medicinal plants. Molecular biology and biochemistry involve discovering the chemical and physical properties of biological molecules and deciphering cellular reactions. Medicinal plant metabolites are diverse and have therapeutic value, but few are from primary metabolism. Many are secondary metabolites derived from primary metabolism, which can be influenced by environmental factors. Genomic sequencing of medicinal plants is limited, but recent studies have revealed genetic underpinnings of important alkaloids. These studies highlight the independent evolution of certain pathways. Ethnopharmacology integrates traditional knowledge with scientific research, guiding metabolomic drug discovery. Indigenous knowledge is crucial for understanding medicinal plants and theirMedicinal plants have been essential for human health for millennia. This review argues that an interdisciplinary approach combining evolutionary ecology, molecular biology/biochemistry, and ethnopharmacology can lead to new breakthroughs in science, including pharmacological discoveries and advancements in human health. Such research integrates data and methods across space, time, and species, building on traditional Indigenous knowledge. This contrasts with past research that oversimplified plant-human relationships and overlooked important discoveries. Medicinal plants and humans should be viewed as partners with complex interactions, including domestication, commensalism, and mutualism. Medicinal plants are not just chemical factories but symbiotic partners that have shaped societies and improved health. Medicinal plants are used in various cultures for physical, mental, and spiritual health. Many species have therapeutic value, and their use has been facilitated by human efforts to enhance their diversity. Despite their cultural significance, most medicinal plant uses have not been clinically evaluated. Only 16% of plants thought to have therapeutic value have been tested for biological activity. Most research on medicinal plants is based on early 20th-century efforts focusing on biochemical characterization and pharmacological activity. Many drugs in use are synthetic analogs of plant secondary metabolites. However, the pharmacological industry increasingly uses synthetic compounds for screening. Despite this, many new drugs are derived from nature, mostly plants. Evolutionary ecology helps understand species origins, interactions, and adaptations. It is rarely included in medical education but is increasingly applied to medicinal plant research. Advances in evolutionary ecology improve the discovery and identification of medicinal plants through online data, DNA barcoding, and species delimitation. DNA barcoding can identify specimens from juvenile plants or poor quality material, but short barcodes often fail to distinguish close relatives. Metabolomic analysis offers an alternative but may be less reliable for species identification due to variability in plant chemistry. Phylogenomic approaches are crucial for understanding the origins and spread of medicinal plants, identifying evolutionary 'hot zones', and their wild relatives. These approaches can also predict and explain plant species for therapeutic molecules. Phylogenomic studies have identified evolutionary hot zones with reported antimalarial use. These findings highlight the importance of integrating traditional knowledge with scientific research. Medicinal plant trait ecology examines how functional traits affect species fitness. These traits are essential for understanding early use and domestication of medicinal plants. Molecular biology and biochemistry involve discovering the chemical and physical properties of biological molecules and deciphering cellular reactions. Medicinal plant metabolites are diverse and have therapeutic value, but few are from primary metabolism. Many are secondary metabolites derived from primary metabolism, which can be influenced by environmental factors. Genomic sequencing of medicinal plants is limited, but recent studies have revealed genetic underpinnings of important alkaloids. These studies highlight the independent evolution of certain pathways. Ethnopharmacology integrates traditional knowledge with scientific research, guiding metabolomic drug discovery. Indigenous knowledge is crucial for understanding medicinal plants and their