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One of the most serious and fatal neurodegenerative disorders, Parkinson disease (PD) is characterized by low levels of dopamine. Reactive oxygen species (ROS) from both endogenous and exogenous sources have a role in the oxidative stress that leads to PD, which is a complex condition. Delo nix Regia is a prominent medicinal plant that is frequently used in Indian systems of medicine. The fruit, leaves, and bark of this plant have been utilised for its antifungal, antiemetic, larvicidal, hepatoprotective, antibacterial, antioxidant, anti-diarrheal, anti-inflammatory, wound-healing, and ant carcinogenic potential, according to Ayurvedic literature. The "antioxidant strategy" is the main topic of this study's therapeutic intervention for Parkinson's disease (PD). The investigation was completed in wistar rats, in which Parkinson’s disease (PD) was induced with haloperidol 2 mg/kg, P.O. The rats were randomly divided into six groups and the test animals received the ethanolic extract of Delo nix regia (DRLE) at a dose of 100, 250 and 500 mg/kg, orally for 15 days. Various behavioural and biochemical parameters were estimated in haloperidol exposed rats. The results of this study conclusively show that Delo nix regia has anti-oxidant activity and neuroprotective activity in haloperidol experimental model of PD.