The pre-dose (0.00 hours) blood sample was collected before dosing and post-dose samples were collected at 2.00, 3.00, 4.00, 5.00, 6.00, 7.00, 7.50, 8.00, 8.50, 9.00, 9.50, 10.00, 10.50, 11.00, 11.50, 12.00, 12.50, 13.00, 14.00, 16.00, 20.00, 24.00 and 30.00 hours in each study period with a washout period of 7 days between the dosing of two periods. Subjects were continuously monitored for well being i.e., blood pressure, radial pulse and oral temperature before check-in, prior to drug administration and at regular intervals post dose in each period. The concentration of Ropinirole in plasma samples obtained from study subjects was determined using validated LC-MS/MS method. Pharmacokinetic and statistical analyses were performed on obtained drug concentration data, using appropriate software.