Abstract
Background: The present study is an attempt to explore the anthelmintic activity of ethanolic extract of flower of Calendula officinalis. Various doses of ethanolic extracts were evaluated for their anthelmintic activity on adult Indian earthworms, Pheretima posthuma. Calendula officinalis Linn has been widely used in homeopathic medicine for the treatment of many diseases. It has been reported to possess many pharmacological activities, which include antibacterial, antifungal, antiviral,antioxidant and anti-inflammatory.
 Methods: The ethanol extract of air dried flowers powder (500g) was prepared by using soxlet apparatus, concentrated and vacuum dried which gave an orange yellowish mass (60.46 g). Extract was subjected to qualitative chemical investigation of phytoconstituents such as glycosides, alkaloids, flavonoids, carbohydrates, tannins, proteins, vitamins, coumarins etc.
 Results: All extracts were able to show anthelmintic activity at 10mg/mL concentration. The activities are comparable with the standard drugs, piperazine citrate and albendazole. The data were found statistically significantly by using one way Anova at 5% level of significance (p< 0.05).
 Conclusion: All the doses of ethanolic extract of calendula officinalis showed dose dependent anthelmintic activity in comparison to standard drugs.
 Keywords: Calendula officinalis, Asteraceae, Anthelmintic, Piperazine citrate, Albendazole
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