Intrapleural injection of carrageenan in groups of control
animals (pretreated orally with saline) induced an acute
inflammatory response characterized by an increase in the
volume of pleural exudates and in the number of leukocytes
migrated into the cavity. Treatment of the animals with the
hydroalcoholic extract of leaves at 500 mg/kg did not reduce
the volume of inflammatory pleural exudates (saline vehicle,
0.90 ± 0.03 ml; hydroalcoholic extract, 0.81 ± 0.05 ml;