The treatment was carried out orally by gavage. In the control and SHAM groups, no treatment was performed, and in the PG, the administration of the formulation containing pterostilbene as the active ingredient was performed. One dose of the drug was administered two hours before the induction of arthritis to all groups; groups 0 were euthanized 12 hours after induction; groups 3 received daily treatment (every 24h) with doses of 0.5 mL at the given concentrations (4 mg/kg; 200 mg/kg; 400 mg/kg), they were euthanized 72h after induction.