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The present study evaluated the therapeutic benefit of the combination of carvacrol, an isoprenoid having potential anti-inflammatory action, with methotrexate in suppressing Complete Freund's Adjuvant induced arthritis and attenuating methotrexate induced hepatic damage. Arthritis was induced in rats with Complete Freund's Adjuvant. Animals received methotrexate (2 mg/kg) intraperitonealy once a week for 5 weeks alone and along with carvacrol orally (50 and 100 mg/kg) respectively from the 10th to the 42nd day. Control and carvacrol alone group were also studied. Paw volume, hypernociception, and erythrocyte sedimentation rate were evaluated as arthritic markers. Hepatic marker enzymes in serum; myeloperoxidase, protein oxidation, and oxidative measures were determined in the liver homogenate. Liver histological assessments were also carried out. Methotrexate significantly controlled arthritis …