Group	Treatment
Group 1	Non-arthritic control/IFA (intraplantar injection of 0.1 ml of IFA)
Group 2	Arthritic control/CFA (intraplantar injection of 0.1 ml CFA)
Groups 3–6	TWE (30, 100, 300 and 1000 mg kg−1 p.o. respectively) daily
Groups 7–10	TAE (30, 100, 300 and 1000 mg kg−1 p.o. respectively) daily
Groups 11–14	TPEE (30–1000 mg kg−1 p.o. respectively) daily, starting from day 10
Groups 15–17	Dexamethasone (0.1, 0.3 and 1.0 mg kg−1 i.p. respectively) every other day.
Groups 18–20	Diclofenac (10, 30 and 100 mg kg−1 i.p. respectively) every other day.
Groups 21–23	Methotrexate (1.0, 0.3 and 1.0 mg kg−1 i.p. respectively) every four days.