The genus Ranunculus L. (Ranunculus) in Asia: a review of its botany, traditional uses, phytochemistry, pharmacology, toxicity, and pharmaceutical preparations

Ranunculus L. genus contains 413 species, and it is the biggest genus in the family Ranunculaceae Juss. This review is to provide botanical characteristics, traditional uses, phytochemistry, pharmacology, toxicity, and pharmaceutical preparations of the genus Ranunculus. The genus Ranunculus contains flavonoids, organic acids, coumarins, lactones, glycosides, sterols, polysaccharides, and trace elements. These chemical constituents complement the pharmacological actions and work together to exert anti-inflammatory, anticancer, antitubercular, antibacterial, antimalarial, etc. Those traditional Chinese medicine characteristics, like clearing away heat and detoxification, make this genus significant in ethnic medicine. The progress in research and the development of various pharmaceutical preparations made it appear in epidemiological and clinical studies. The genus Ranunculus has attracted the attention of experts and scholars in many fields due to its unique advantages. However, there are many species that are not scientifically investigated. The toxicity issues are also a huge concern. Fortunately, the toxicity can be overcome via special processes like drying or heating and by choosing a safe extraction solvent, such as water thus ensuring the safety of medication. Pharmaceutical preparations containing the plants from Ranunculus have gratifying clinical value, but they are not promoted sufficiently. Therefore, further research should be carried out to promote the genus for its health benefits to humans.