Objectives: The study was undertaken to evaluate the in vitro anti-inflammatory and anti-arthritic activity of the ethanolic extract of leaves of Pyrenacantha volubilis (EEPV) using human red blood cells (HRBCs) membrane stabilization and protein denaturation methods.
 Methods: In the present study, the in vitro anti-inflammatory and anti-arthritic activity of EEPV was carried out using HRBC membrane stabilization by hypotonicity-induced hemolysis and protein denaturation using egg albumin methods at various concentrations (100, 200, 400, 800, and 1000) of EEPV. Diclofenac sodium was used as reference standard.
 Results: P. volubilis was effective in inhibiting HRBC membrane stabilization and protein denaturation in a dose-dependent manner and was comparable to the standard drug diclofenac sodium.
 Conclusion: The study suggests that P. volubilis has potential anti-inflammatory and anti-arthritic activity.
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