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ORIGINAL ARTICLE
Year : 2010  |  Volume : 1  |  Issue : 3  |  Page : 167-171

Study of the synergistic anti-inflammatory activity of Solanum xanthocarpum Schrad and Wendl and Cassia fistula Linn


C. U. Shah College of Pharmacy, SNDT Women's University, Santacruz (W), Mumbai, India

Correspondence Address:
Shraddha Anwikar
C. U. Shah College of Pharmacy, SNDT Women's University, Santacruz (W), Mumbai
India
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DOI: 10.4103/0974-7788.72489

PMID: 21170209

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Introduction: Nonsteroidal and steroidal drugs are generally used as a part of drug therapy in inflammation. However, these drugs have severe side-effects like nausea and vomiting. Therefore, there is a need to identify anti-inflammatory compounds that will be effective with a better safety profile. Solanum xanthocarpum Schrad and Wendl and Cassia fistula Linn has many therapeutic uses mentioned in Ayurveda and therefore we aimed to study its anti-inflammatory activity both alone and in combination. Materials and Methods: The water extract of dried fruits of Solanum xanthocarpum Schrad and Wendl and dried pulp of Cassia fistula Linn was prepared. The anti-inflammatory activity of these extracts was investigated using the carragenan-induced paw edema model in rats individually and in two different combinations. ED50 of both the extracts singly and in combination were calculated by dose-response curves, and this information was then plotted on the isobologram. The interaction index of the extracts was also investigated to determine whether both the extracts in combination show synergistic or antagonistic or additive effects. Results: It was observed that extracts of dried fruits of Solanum xanthocarpum showed more anti-inflammatory activity than dried fruits of Cassia fistula Linn. Both the extracts showed maximum anti-inflammatory activity at 500 mg/kg dose. Among the different dose combinations of both the extracts, the 1:1 combination at the 500 mg/kg dose showed maximum percentage inhibition of 75%, which was comparable with the positive control, diclofenac sodium, which showed 81% inhibition. Conclusion: As revealed by the isobolograms, both the combinations fell below the additivity line, which indicates synergistic interactions between Solanum xanthocarpum and Cassia fistula extracts. Interaction indices of both combinations were observed to be <1, which re-demonstrated the synergistic effects of the combination.


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